Tempietto del Bramante.

Continuing my Rome series:)
*********************************The so-called Tempietto (Italian: 'small temple') is a small commemorative tomb (martyrium) built by Donato Bramante, possibly as early as 1502, in the courtyard of San Pietro in Montorio. Also commissioned by Ferdinand and Isabella, the Tempietto is considered a masterpiece of High Renaissance Italian architecture.[4](WIKI)