Serfs, also known as peasants, were the lowest class of citizen in feudal societies. They were allowed to live on land own by Lords in return for labor, which was practically slavery.
What made roman architecture unique was Roman architecture<span> is famous for its domes, arches, amphitheaters, temples, thermaes (bath houses), atriums, aqueducts, apartments, houses, and for many other factors that </span>made<span> it </span><span>unique</span>
A) Those who will not work, could not eat.