Tarquinius Priscus was the fifth king of ancient Rome, reigning from 616 to 579 BCE. He is known for his significant contributions to the city's infrastructure, including the construction of the Circus Maximus and the expansion of the Roman Senate. His reign marked a period of growth and development for the early Roman state. Originally from Etruria, Tarquinius Priscus came to power after marrying the daughter of the previous king, Ancus Marcius. His rule was characterized by military conquests and the establishment of various religious and cultural institutions, which helped solidify the power of the monarchy in Rome.