Question: The Temple of Diana in ancient Rome was a Roman temple which, according to the early semi-legendary history of Rome, was built in the 6th century BC during the reign of the king Servius Tullius, the regal period, also called what, was the period of the ancient Roman civilization characterized by a monarchical form of government of the city of Rome and its territories?

full_context: Document 1: Ostrogothic Kingdom: The Ostrogothic Kingdom, officially the Kingdom of Italy (Latin: "Regnum Italiae"), was established by the Ostrogoths in Italy and neighbouring areas from 493 to 553.
Document 2: Campaign history of the Roman military: From its origin as a city-state on the peninsula of Italy in the 8th century BC, to its rise as an empire covering much of Southern Europe, Western Europe, Near East and North Africa to its fall in the 5th century AD, the political history of Ancient Rome was closely entwined with its military history. The core of the campaign history of the Roman military is an aggregate of different accounts of the Roman military's land battles, from its initial defense against and subsequent conquest of the city's hilltop neighbors on the Italian peninsula, to the ultimate struggle of the Western Roman Empire for its existence against invading Huns, Vandals and Germanic tribes. These accounts were written by various authors throughout and after the history of the Empire. Following the First Punic War, naval battles were less significant than land battles to the military history of Rome due to its encompassment of lands of the periphery and its unchallenged dominance of the Mediterranean Sea.
Document 3: Quattro Fontane: The Quattro Fontane (the Four Fountains) is an ensemble of four Late Renaissance fountains located at the intersection of Via delle Quattro Fontane and Via del Quirinale in Rome. They were commissioned by Pope Sixtus V and built at the direction of Muzio Mattei, and were installed between 1588 and 1593. The figure of one fountain is said to represent the River Tiber, in front of an oak-tree; a she-wolf, the symbol of Rome, was a later addition. A second fountain represents the River Aniene, a tributary of the Tiber, called Anio in ancient Rome, which provided most Roman aqueducts with water. Pope Sixtus proposed to build a canal to bring the water of the Aniene to Rome. The other two fountains feature female figures believed to represent the Goddess Diana; the symbol of Chastity; and the Goddess Juno, the symbol of Strength, but it is possible that they may also represent rivers. The fountains of the Aniene, Tiber, and Juno are the work of Domenico Fontana. The fountain of Diana was designed by the painter and architect Pietro da Cortona.
Document 4: Porta Esquilina: The Porta Esquilina (or Esquiline Gate) was a gate in the Servian Wall Tradition dates it back to the 6th century BC, when the Servian Wall was said to have been built by the Roman king Servius Tullius, however modern scholarship and evidence from archaeology indicates a date in the fourth century BC.
Document 5: Kingdom of Romania: The Kingdom of Romania (Romanian: "Regatul României" ) was a constitutional monarchy which existed between 13 March 1881 and 30 December 1947, specified by the first three Constitutions of Romania (1866, 1923, 1938). The Kingdom of Romania began with the reign of King Carol I of Romania who gained Romanians' independence from the Ottoman Empire in the Romanian War of Independence (part of the Russo-Turkish War of 1877-1878), and ended with the abdication of King Michael I of Romania on 30 December 1947, imposed by the Soviet Union with the tacit and secret, implicit consent of its allies (as a result of the Yalta Conference and secret agreements). As such, it is quite distinct from the Romanian Old Kingdom, which refers strictly to the reign of King Carol I of Romania, between 14 March (O.S.) 1881 and 27 September (O.S.) 1914.
Document 6: Servian constitution: The Servian constitution is the military and political organization of ancient Rome attributed by Roman tradition to the semi-legendary sixth king of Rome, Servius Tullius (578–534 BC). Most of the Servian reforms extended voting rights to certain groups, in particular to Rome's citizen-commoners who were minor landholders or landless citizens hitherto disqualified from voting by ancestry, status or ethnicity—collectively, the "plebs" as distinguished from the hereditary patricians. These reforms thus redefined the fiscal and military obligations of all Roman citizens. The so-called Servian constitution probably represents a long-drawn, complex and piecemeal process extending from Servius' predecessors, Ancus Marcius and Tarquinius Priscus, to his successor Tarquinius Superbus, and into the Middle and Late Republic. Rome's military and territorial expansion and the consequent changes in its population made franchise regulation and reform an ongoing necessity. The wholesale attribution of these measures to Servius "cannot be taken at face value".
Document 7: Temple of Artemis: The Temple of Artemis or Artemision (, Turkish: "Artemis Tapınağı" ), also known less precisely as the Temple of Diana, was a Greek temple dedicated to the goddess Artemis. It was located in Ephesus (near the modern town of Selçuk in present-day Turkey). One of the Seven Wonders of the Ancient World, it was completely rebuilt three times before its final destruction in 401 AD. Only foundations and sculptural fragments of the latest of the temples at the site remain.
Document 8: Roman Republic: The Roman Republic (Latin: Res publica Romana ; ] ) was the era of ancient Roman civilization beginning with the overthrow of the Roman Kingdom, traditionally dated to 509 BC, and ending in 27 BC with the establishment of the Roman Empire. It was during this period that Rome's control expanded from the city's immediate surroundings to hegemony over the entire Mediterranean world.
Document 9: Kingdom of Italy: The Kingdom of Italy (Italian: "Regno d'Italia" ) was a state which existed from 1861, when King Victor Emmanuel II of Sardinia was proclaimed King of Italy, until 1946, when a constitutional referendum led civil discontent to abandon the monarchy and form the Italian Republic. The state was founded as a result of the unification of Italy under the influence of the Kingdom of Sardinia, which can be considered its legal predecessor state.
Document 10: Porta Collina: The Colline Gate (Latin Porta Collina) was a landmark in ancient Rome, supposed to have been built by Servius Tullius, semi-legendary king of Rome 578–535 BC. The gate stood at the north end of the Servian Wall, and past it were two important streets, the Via Salaria and Via Nomentana. Within this area the Alta Semita linked the Quirinal with the Porta Carmentalis. Several temples were located near the gate, including temples of Venus Erycina and Fortuna. To a person facing the gate in the 3rd century AD, the Gardens of Sallust would have been on the left, with the Baths of Diocletian on the right.
Document 11: Temple of Diana (Rome): The Temple of Diana in ancient Rome was a Roman temple which, according to the early semi-legendary history of Rome, was built in the 6th century BC during the reign of the king Servius Tullius.
Document 12: Roman Kingdom: The Roman Kingdom, or regal period, was the period of the ancient Roman civilization characterized by a monarchical form of government of the city of Rome and its territories.
Document 13: Francia: Francia or Frankia, also called the Kingdom of the Franks (Latin: "Regnum Francorum" ), Frankish Kingdom, Frankish Empire, Frankish Realm or occasionally Frankland, was the territory inhabited and ruled by the Franks, a confederation of West Germanic tribes, during late antiquity and the Early Middle Ages.
Document 14: Servius Tullius: Servius Tullius was the legendary sixth king of Rome, and the second of its Etruscan dynasty. He reigned 575–535 BC. Roman and Greek sources describe his servile origins and later marriage to a daughter of Lucius Tarquinius Priscus, Rome's first Etruscan king, who was assassinated in 579 BC. Servius is said to have been the first Roman king to accede without election by the Senate, having gained the throne by popular support; and the first to be elected by the Senate alone, without reference to the people.
Document 15: Tullia Minor: Tullia Minor is a semi-legendary figure in Roman history. She was the last queen of Rome. The younger daughter of Rome's sixth king, Servius Tullius, she married Lucius Tarquinius. Along with her husband, she arranged the overthrow and murder of her father, securing the throne for her husband. Her actions made her an infamous figure in ancient Roman culture.
ground_truth: Roman Kingdom