Tempietto generally means a small temple-like or pavilion-like structure and is a name of many places in Italy:
San Pietro in Montorio#The Tempietto in Rome, a tomb by Donato Bramante
Villa Barbaro#Church at Maser, a church planned by Palladio
Tempietto of Sant'Antonio, Rimini, a baroque church in Rimini
Wikipedia https://en.wikipedia.org/wiki/Tempietto
Address 1 Piazza di San Pietro in Montorio, Roma 00153, Italy
Coordinates 41°53'19.456" N 12°27'59.016" E