A thing was the governing assembly of an early Germanic society, made up of the free people of the community presided over by lawspeakers. The word appears in Old Norse, Old English, and modern Icelandic as þing (where þ is pronounced like unvoiced "th" /θ/), in Middle English (as in modern English), Old Saxon, Old Dutch, and Old Frisian as thing, in German as Ding, and in modern Norwegian, Danish, Swedish, Faroese, Gutnish, and Norn as ting, all from a reconstructed Proto-Germanic neuter *þingą; the word is the same as the more common English word thing, both having at their heart the basic meaning of "an assemblage, a coming together of parts"—in the one case, an "assembly" or "meeting", in the other, an "entity", "object", or "thing". The meeting-place of a thing was called a "thingstead" (Old English þingstede) or "thingstow" (Old English þingstōw).
The Anglo-Saxon folkmoot (Old English folcgemōt, "folk meeting"; Middle English folkesmōt; modern Norwegian folkemøte) was analogous, the forerunner to the witenagemōt and a precursor of the modern Parliament of the United Kingdom.
Today the term lives on in the English term hustings, in the official names of national legislatures and political and judicial institutions of Nordic countries and, in the Manx form tyn, as a term for the three legislative bodies on the Isle of Man.
The Old Norse, Old Frisian, and Old English þing with the meaning "assembly" is identical in origin to the English word thing, German Ding, Dutch ding, and modern Scandinavian ting when meaning "object". All of these terms derive from Proto-Germanic *þingą meaning "appointed time", and some[who?] suggest an origin in Proto-Indo-European *ten-, "stretch", as in a "stretch of time for an assembly". The word shift in the meaning of the word thing from "assembly" to "object" is mirrored in the evolution of the Latin causa ("judicial lawsuit") to modern French chose, Spanish/Italian/Catalan cosa, and Portuguese coisa (all meaning "object" or "thing"). A word with similar meaning, the cognate to English sake (purpose), sak in Norwegian and Swedish, sag in Danish, zaak in Dutch, and Sache in German, still retains the meaning "affair, matter" alongside "thing, object".
In English the term is attested from 685 to 686 CE in the older meaning "assembly"; later it referred to a being, entity or matter (sometime before 899), and then also an act, deed, or event (from about 1000). The early sense of "meeting, assembly" did not survive the shift to Middle English. The meaning of personal possessions, commonly in the plural, first appears in Middle English around 1300.
In the Viking Age, things were the public assemblies of the free men of a country, province, or a hundred (Swedish: härad, hundare, Danish: herred) (Swedish: härad, hundare, Danish: herred). They functioned as both parliaments and courts at different levels of society—local, regional, and supra-regional. Their purpose was to solve disputes and make political decisions, and thing sites were also often the place for public religious rites. According to Norway’s Law of the Gulathing, only free men of full age could participate in the assembly. According to written sources, women were clearly present at some things despite being left out of the decision making bodies, such as the Icelandic Althing..
In the pre-Christian clan-culture of Scandinavia, the members of a clan were obliged to avenge injuries against their dead and mutilated relatives. As a result, feuding is often seen as the most common form of conflict resolution used in Viking society. However, things are under-appreciated as balancing structures used to reduce tribal feuds and avoid social disorder in North-Germanic cultures. Things played an important role in Viking society as forums for conflict resolution, marriage alliances, power display, honor, and inheritance settlements.
From Sweden and England, it is well-known that assemblies were held both at natural and man-made mounds, often burial mounds. Specifically in Scandinavia, unusually large rune-stones and inscriptions suggesting a local family’s attempt to claim supremacy are common features of thing sites. It is also common for assembly sites to be located close to communication routes, such as navigable water routes and clear land routes.
The thing met at regular intervals, legislated, elected chieftains and kings, and judged according to the law, which was memorized and recited by the "lawspeaker" (the judge). The thing's negotiations were presided over by the lawspeaker and the chieftain or the king. In reality the thing was dominated by the most influential members of the community, the heads of clans and wealthy families, but in theory one-person one-vote was the rule.
Towards the end of the Viking age, royal power became centralized and the kings began to consolidate power and control over the assemblies. As a result, things lost most of their political role and began to function largely as courts in the later Middle Ages.
In the period between the eleventh and fourteenth centuries, Norway went through a state-formation process that elevated the control and power of the king. On the regional level, it has been assumed that the king would have taken control of the organization of assemblies via local representatives. Today, few thing sites from Norway are known for certain, and as new assembly sites are found, scholars question whether these are old jurisdiction districts which the king used as a foundation for his organization or whether he created new administrative units. In southeast Norway in particular, one hypothesis for why the king would have established new thing sites might be that they were a “strategic geopolitical response to the threat from the Danish king in the beginning of the 11th century.” Since the record of Norwegian thing sites is not comprehensive, it is not favorable to rely on archeological and topographical characteristics to determine whether they were established prior to the state-formation period.
In northern and southwestern Norway, there appears to have been a close association between chieftains’ farms and sites interpreted to be assemblies or court sites. These areas were considered neutral ground where the landowning elite could meet for political and religious activities. This view is based partly on Saga narratives of Viking chieftains as well as the distribution of large grave mounds. Ultimately, this neutrality was important for thing participants’ cooperation; royal officials required cooperation in order to look after the king’s interests in local areas. In this regard, Norwegian things became an arena for cooperation between the royal representatives and the farmers.
Based on what is known from later medieval documents, one deep-rooted custom of Norwegian law areas was the bearing of arms coming from the old Germanic tradition of the “weapon-take,” which refers to the rattling of weapons at meetings to express agreement.  The Law of the Gulathing provides that the handling of these weapons should be controlled and regulated.
This is seen at Haugating, the thing for Vestfold in Norway, which was located in Tønsberg at Haugar (from the Old Norse haugr meaning hill or mound). This site was one of Norway's most important places for the proclamation of kings. In 1130, Harald Gille called together a meeting at the Haugating at which he was declared to be King of Norway. Sigurd Magnusson was proclaimed king in 1193 at Haugating. Magnus VII was acclaimed herary King of Norway and Sweden at the Haugating in August 1319.
Similar to Norway, thing sites in Sweden also experienced changes in administrative organization beginning in the late tenth and eleventh century. This was a result of the power struggle between the rising Christian royal power in the process of establishing itself and the old, local magnate families attempting to maintain power. The battle for power between the king and local magnates is most visible through runic inscriptions at thing sites, which were used to make important power statements. Swedish assembly sites could be characterized by a number of typical features: large mounds, rune-stones, and crossings between roads by land or water to allow for greater accessibility. 
A famous incident took place when Þorgnýr the Lawspeaker told the Swedish king Olof Skötkonung (c. 980–1022) that the people, not the king, held power in Sweden; the king realized that he was powerless against the thing and gave in. Main things in Sweden were the Thing of all Swedes, the Thing of all Geats and the Lionga thing.
The island of Gotland had twenty things in late medieval times, each represented at the island-thing called landsting by its elected judge. New laws were decided at the landsting, which also took other decisions regarding the island as a whole. The landsting's authority was successively eroded after the island was occupied by the Teutonic Order in 1398. In late medieval times the thing was made up of twelve representatives for the farmers, free-holders or tenants.
As a representative legislative body, the things in Iceland were similar to those in greater Scandinavia, but they had a very clear organizational structure. Iceland was divided into four administrative quarters during the Viking Age with a fixed number of thirty-nine godis: twelve godis in the northern quarter and nine each in the eastern, southern, and western quarters.
The main distinction between Iceland and greater Scandinavia lies in the organization of the Icelandic Althing, the main assembly during the Viking period and the Middle Ages. Unlike other European societies in the Middle Ages, Iceland was unique for relying on the Althing’s legislative and judicial institutions at the national level rather than an executive branch of government. Þingvellir was the site of the Althing, and it was a place where people came together once a year to bring cases to court, render judgments, and discuss laws and politics.” At the annual Althing, the thirty-nine godis along with nine others served as voting members of the Law Council (Lögrétta), a legislative assembly. The Lögrétta reviewed the laws which the Lawspeaker recited, made new laws, set fines and punishments and were informed of sentences of outlawry and banishment that were passed by the courts in local spring assemblies.
Besides the Althing, there were local assembly districts in each of the four quarters of Iceland, and each year a Spring Assembly (vorþing) was brought together by three godis who lived in each local assembly district (samþingsgoðar). The four quarters also had courts (fjórðungsdómar) that met at the Althing after a constitutional reform around 965. The godis appointed the judges for these courts from the farmers in their districts.
In the early twentieth century, scholars identified two potential Greenlandic thing sites at Brattahlíð in Eiríksfjörður and Garðar in Einarsfjörður; both are located in the Eastern Settlement of Greenland. These two sites were located through a combination of written sources and archeological evidence. Between these two Greenlandic sites, there are a number of overlapping characteristics that support the hypothesis that these booth sites are assemblies. However, not all “assembly features” previously seen in Scandinavia appear at every assembly site, and there are also characteristics that have either not been recorded in Greenland or are unique to Greenland.
The temporary turf structures of the Greenlandic booths have only been recorded in Iceland and would not have been seen at the assembly sites of Viking Age Sweden. Further, the booth sites at Brattahlíð and Garðar were located close to high-status farms. Taken together, it indicates that trade would have taken place at these sites, and given the sparse nature of the Greenlandic settlement, it is reasonable that the participants of the thing would have taken the opportunity for social interaction or trade when gathered with others.
As a part of the Germanic world, thing sites were also found in the British Isles. In England, there is Thingwall on the Wirral. In the Yorkshire and former Danelaw areas of England, wapentakes—another name for the same institution—were used in public records. Several places ending in the -by ("village") place name suffix originally possessed their own laws, by-laws, and jurisdiction subject to the wapentake in which they served, which often extended over a surrounding ground called a thorpe ("hamlet"). If there was a riding surrounding the wapentake, the wapentake would merely be a local assembly coordinating the power of the riding. In Scandinavian York's case, it would be under the king's command at what is now King's Square in York.
The Kingdom of East Anglia was in control of the Danelaw which had been organised as the Five Boroughs. The Five were fortifications defending land against Wessex, or against the Vikings, depending on who ruled there; together with Lindsey, Lincolnshire, which was divided into three ridings like Yorkshire. Again, the naming of the two roads named Inner and Outer Ting Tong on a hill-top in Devon between Budleigh Salterton, Woodbury and Exmouth is widely derided as fanciful, but may be derived from Thing-Tun, a dun (hill fort) or tun (settlement) around the place where the Thing used to meet.
Thynghowe was an important Danelaw meeting place, or thing, located in Sherwood Forest, Nottinghamshire, England. It was lost to history until its rediscovery in 2005–06 by local history enthusiasts Lynda Mallett and Stuart Reddish. The site lies amidst the old oaks of an area known as the Birklands in Sherwood Forest. Experts believe it may also yield clues as to the boundary of the Anglo Saxon kingdoms of Mercia and Northumbria. English Heritage has recently inspected the site, and has confirmed it was known as "Thynghowe" in 1334 and 1609. It functioned as a place where people came to resolve disputes and settle issues. Thynghowe is an Old Norse name, although the site may be older than the Danelaw, perhaps even Bronze Age. The word "howe" is derived from the Old Norse word haugr meaning mound. This often indicates the presence of a prehistoric burial mound.
The assembly of things were typically held at a specially designated place, often a field or common, like Þingvellir, the old location of the Icelandic thing (Alþingi). The parliament of the Isle of Man is still named after the meeting place of the thing, Tynwald, which etymologically is the same word as "þingvellir" (there is still an annual public assembly at Tynwald Hill each July 5, where the new Manx laws are read out and petitions delivered). Other equivalent place names can be found across northern Europe; in Scotland, there is Dingwall in the Scottish Highlands and Tingwall, occurring both in Orkney and Shetland, and further south there is Tinwald, in Dumfries and Galloway. In Sweden, there are several places named Tingvalla, which is the modern Swedish form of "Þingvellir", and the Norwegian equivalent is found in the place name Tingvoll. In Dublin, Ireland the Thingmote was a raised mound, 40 foot high and 240 foot in circumference, where the Norsemen assembled and made their laws. It stood on the south of the river, adjacent to Dublin Castle, until 1685.
It is contested between scholars to what extent things were sites of economic transactions and commerce as well as arenas for political and legal decisions. In Norway, it is clear that the assemblies functioned as an administrative level for economic transactions and taxes to the king. The role of commerce at the thing is more undetermined in Iceland in particular because of the role of saga literature in influencing conclusions about things. Þingvellir was thought of as a trading place as a result of saga passages and law texts that refer to trade:
As shown in the Laxdæla saga, meetings at Þingvellir required people to travel from long distances and gather together for an extended period of time, thus it was inevitable that entertainment, food, tools, and other goods would have played a role in the gatherings. The main question lies in whether trade was conducted in the assembly or on the margins of the gathering. Similarly, there are unanswered questions about the connection between trade and assembly in Greenland. Research on Scandinavian trade and assembly is burgeoning, and thus far evidence has mostly been found in written sources, such as the sagas, and place names, “such as the “Disting” market that is said to have been held during the thing meetings at Gamla Uppsala in Sweden."
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In addition, thing can be found in the name of the Swedish Assembly of Finland (Svenska Finlands folkting), a semi-official body representing the Finland Swedish, and those of the three distinct elected Sámi assemblies which are all called Sameting in Norwegian and Swedish.
The Swedish national legislature, since medieval times, has borne a different style, Riksdag, which is cognate to the old name of the German national assembly, Reichstag. In Sweden, however, ting is used to name the subnational county councils, which are called Landsting. That name was also used in medieval times for the tings that governed the historical Landskap provinces, that were superseded by the counties in the 17th century. The name ting is also found in the names of the first level instances of the Swedish and Finnish court system, which are called tingsrätt (Finnish: käräjäoikeus), the Court of the Thing.
Similarly, prior to 1953, the Danish legislature was known as Rigsdagen, which comprised the two houses of the Folketing "People's Thing" and Landsting "Land Thing". The latter, which was reserved for people of means, was abolished by the constitution of 1953.
The Norwegian parliament, the Storting, has historically been divided into two chambers named the Lagting and the Odelsting, which translates loosely into the "Thing of the Law" and the "Thing of the Allodial rights". However, for much of the Storting's recent history, the division into Lagting and Odelsting has been mostly ceremonial, and the Storting has generally operated as a unicameral parliament. A constitutional amendment passed in February 2007 abolished the Lagting and Odelsting, making this de facto unicameralism official following the 2009 election.
On the lower administrative level the governing bodies on the county level in Norway are called Fylkesting, the Thing of the County. The names of the judicial courts of Norway contain for the most part the affix ting. The primary level of courts is called the Tingrett, with the same meaning as the Swedish Tingsrätt, and four of the six Norwegian Courts of Appeal are named after historical Norwegian regional Things (Frostating, Gulating, Borgarting and Eidsivating).