Nevertheless, the term "Roman villa" generally covers buildings with the common features of being extra-urban (i.e. located outside urban settlements, unlike the domus which was inside them) and residential, with accommodation for the owner.
[1] The present meaning of "villa" is partially based on the fairly numerous ancient Roman written sources and on archaeological remains, though many of these are poorly preserved.
[citation needed] Wealthy Romans also escaped the summer heat in the hills within easy reach of Rome, especially around Frascati and including the imperial Hadrian's Villa-palace at Tivoli.
[23] The late Roman Republic witnessed an explosion of villa construction in central Italy (current regions of Toscana, Umbria, Lazio, and Campania), especially in the years following the dictatorship of Sulla (81 BC).
[28] Villas specialising in the seagoing export of olive oil to Roman legions in Germany became a feature of the southern Iberian province of Hispania Baetica.
[citation needed] As late as 698, Willibrord established Echternach Abbey at a Roman villa near the city of Trier which Irmina of Oeren, daughter of Dagobert II, king of the Franks, presented to him.