constructed a new temple to Janus and, after establishing peace with Rome's neighbours, closed the doors of the temple to indicate a state of peace. They remained closed for the rest of his reign. He established the Vestal Virgins at Rome, as well as the Salii, and the flamines for Jupiter, Mars and Quirinus. He also established the office and duties of pontifex maximus. Numa reigned for 43 years. He reformed the Roman calendar by adjusting it for the solar and lunar year, as well as by adding the months of January and February to bring the total number of months to twelve. Tullus Hostilius Tullus Hostilius was as warlike as Romulus had been, completely unlike Numa as he lacked any respect for the gods. Tullus waged war against Alba Longa, Fidenae and Veii and the Sabines. During Tullus's reign, the city of Alba Longa was completely destroyed and Tullus integrated its population into Rome. Tullus is attributed with constructing a new home for the Senate, the Curia Hostilia, which survived for 562 years after his death. According to Livy, Tullus neglected the worship of the gods until, towards the end of his reign, he fell ill and became superstitious. However, when Tullus called upon Jupiter and begged assistance, Jupiter responded with a bolt of lightning that burned the king and his house to ashes. His reign lasted for 32 years. Ancus Marcius Following the mysterious death of Tullus, the Romans elected a peaceful and religious king in his place, Numa's grandson, Ancus Marcius. Much like his grandfather, Ancus did little to expand the borders of Rome and only fought wars to defend the territory. He also built Rome's first prison on the Capitoline Hill. Ancus further fortified the Janiculum Hill on the western bank, and built the first bridge across the Tiber River. He also founded the port of Ostia Antica on the Tyrrhenian Sea and established Rome's first salt works, as well as the city's first aqueduct. Rome grew, as Ancus used diplomacy to peacefully unite smaller surrounding cities into alliance with Rome. Thus, he completed the conquest of the Latins and relocated them to the Aventine Hill, thus forming the plebeian class of Romans. He died a natural death, like his grandfather, after 25 years as king, marking the end of Rome's Latin-Sabine kings. Lucius Tarquinius Priscus Lucius Tarquinius Priscus was the fifth king of Rome and