Ostia Anti­ca is an impor­tant arche­o­log­i­cal site that once was the sea­port for Rome. It is locat­ed less than 20 miles from Rome at the mouth of the Riv­er Tiber. The site has well-pre­served ancient build­ings, some of which date back to the fourth cen­tu­ry BC. Ostia Anti­ca is known for the out­stand­ing fres­coes and mosaics on these old build­ings, as well as ancient pub­lic toi­lets that turned bath­rooms into a social set­ting.