Tempietto, or a "little temple" designed by the architect donato bramante, was erected in rome, italy, during the high renaissance era, and was built above the place where it is believed that saint peter was:

The Tempietto del Bramante dates back to 1502, and it was erected as a “martyrium” to remember the execution of St. Peter. Below the round room there is a crypt, where a plaque on the floor protects the hole that was supposedly left from the cross of St. Peter.

The building was ordered by the Spanish royal family because of a vow made for the birth of their first son, John, who dies in 1497.

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