Popular assembly in the context of "Mass meeting"

During the Classical era and Hellenistic era of Classical Antiquity, many Hellenic city-states had adopted democratic forms of government, in which free (non-slave), native (non-foreigner) adult male citizens of the city took a major and direct part in the management of the affairs of state, such as declaring war, voting supplies, dispatching diplomatic missions and ratifying treaties. These activities were often handled by a form of direct democracy, based on a popular assembly. Others, of judicial and official nature, were often handled by large juries, drawn from the citizen body in a process known as sortition.

By far the most well-documented and studied example is the Athenian democracy in Athens. However, there are documented examples of at least fifty-two Greek city-states including Corinth, Megara, and Syracuse that also had democratic regimes during part of their history. According to Ober (2015), the proportion of Greek city-states with democratic regimes gradually increased from the mid 6th century BC to the end of the 4th century BC, when perhaps half of the one-thousand Greek city-states in existence at the time had democratic regimes.

The Great People's Assembly of the Serb People in Montenegro (Serbo-Croatian: Велика народна скупштина српског народа у Црној Гори, romanized: Velika narodna skupština srpskog naroda u Crnoj Gori), commonly known as the Podgorica Assembly (Подгоричка скупштина, Podgorička skupština), was an ad hoc popular assembly convened in November 1918, after the end of World War I in the Kingdom of Montenegro. The committee convened the assembly with the aim of facilitating an unconditional union of Montenegro and Serbia and removing Nikola I of Montenegro from the throne. The assembly was organised by a committee supported by and coordinating with the government of the Kingdom of Serbia. The unification was successful and preceded the establishment of the Kingdom of Serbs, Croats and Slovenes as a unified state of South Slavs by mere days. The unification was justified by Serbian irredentists by the need to create a single Serbian state for all Serbs, including Montenegro, where a part of the population believed that Montenegro belonged to the Serbian nation and supported the unification.

Nikola I criticised the Podgorica Assembly's elections and resolutions, arguing both were illegitimate and unlawful while his government was in exile in France. Opponents of the unconditional union, known as the Greens for the colour of paper used for pro-independence candidates, supported either full independence of Montenegro or a federation or a confederation with Serbia and other South Slavs where Montenegro would be an equal partner.

Curia (pl.: curiae) in ancient Rome referred to one of the original groupings of the citizenry, eventually numbering 30, and later every Roman citizen was presumed to belong to one. While they originally probably had wider powers, they came to meet for only a few purposes by the end of the Republic: to confirm the election of magistrates with imperium, to witness the installation of priests, the making of wills, and to carry out certain adoptions.

The term is more broadly used to designate an assembly, council, or court, in which public, official, or religious issues are discussed and decided. Lesser curiae existed for other purposes. The word curia also came to denote the places of assembly, especially of the senate. Similar institutions existed in other towns and cities of Italy.

The Regional Congresses of Peasants, Workers and Insurgents represented the "highest form of democratic authority" within the political system of the Makhnovshchina. They brought together delegates from the region's peasantry, industrial workers and insurgent soldiers, which would discuss the issues at hand and take their decisions back with them to local popular assemblies.

The Comitium (Italian: Comizio) was the original open-air public meeting space of Ancient Rome, and had major religious and prophetic significance. The name comes from the Latin word for "assembly". The Comitium location at the northwest corner of the Roman Forum was later lost in the city's growth and development, but was rediscovered and excavated by archaeologists at the turn of the twentieth century. Some of Rome's earliest monuments, including the speaking platform known as the Rostra, the Columna Maenia, the Graecostasis, and the Tabula Valeria, were part of or associated with the Comitium.

The Comitium was the location for much of the political and judicial activity of Rome. It was the meeting place of the Curiate Assembly, the earliest Popular assembly of organised voting divisions of the Republic. Later, during the Roman Republic, the Tribal Assembly and Plebeian Assembly met there. The Comitium was in front of the meeting house of the Roman Senate – the still-existing Curia Julia and its predecessor, the Curia Hostilia. The Curia Julia is associated with the Comitium by both Livy and Cicero.