Noun
senate-house (plural senate-houses)
A house in which a senate meets, or a place of public council.
He went to the senate-house with a group of armed men, sat himself on the throne, and summoned the senators to attend upon King Tarquin. Source: Internet
When Servius Tullius arrived at the senate-house to defend his position, Tarquinius threw him down the steps and Servius was murdered in the street by Tarquin's men. Source: Internet
Tullia encouraged Lucius Tarquinius to secretly persuade or bribe senators, and Tarquinius went to the senate-house with a group of armed men. Source: Internet