Tor Vergata University is situated outside the city center of Rome. Please note that you must estimate the commute to the Conference from the city center the days 27 and 28th of June. We think the hotels on the area of Termini Station can facilitate this transportation.
We have seen good prices in the following:
Metropole Roma Star Hotels
Best Western Plus Hotel Universo Roma, Italy. https://www.bestwestern.com/en_US/book/roma/hotel-rooms/best-western-plus-hotel-universo/propertyCode.98024.html
Hotel Quirinale Rome, Italy https://www.bestwestern.com/en_US/book/rome/hotel-rooms/hotel-quirinale/propertyCode.86106.html
For other Hotels and variety of prices please look here: https://www.turismoroma.it/en/node/18616