A villa is/was a Roman country residence. In ancient Rome the villas were large and luxurious and most of them had land associated with them so they could be self-supporting. A domus was a house which could be of any size and in any location. Some were modest and others were large and luxurious, it all depended upon the neighborhood and the wealth of the owner, just like today.
Large houses in Ancient Rome were called villas. These villas could be either inside or out of cities, some had large grounds-with room for baths, gardens etc. An ordinary house in the city itself was called a domus with little or no land, but they could still be large and elegant.
The term Roman villa refers to a style of architecture. Roman villas were originally country houses built for upper class Romans. These buildings were often quite palatial and an example of the owners wealth and prosperity.
Domus
The Latin root word for 'house' is "domus."
Est domus means "the home".
There are a couple of possibilities. "Villa" is the latin word for a house but "domus" meaning home can also be used however I think that is generally for more transitive or possessive purposes.
Domus Conversorum was created in 1253.
Domus in undis is "a home in the waves".
Domus Mundi was created in 1999-03.
Victor Domus has written: 'The democracy'
Domus Academy was created in 1982-12.
A patrician's house was called a domus, the same as any other Roman house. In ancient Rome, a house was a house, its size didn't give it a special name. The only special indication of housing was the "insulae" or apartment houses, which connoted multi-family dwellings rather than private homes for one family.