This temple-turned-church, located in the Roman Forum, was built in 141 AD and served as a place of worship for the deified Roman emperor Antoninus Pius and his wife, Faustina. Today, it is a Roman Catholic church devoted to Saint Lorenzo of Miranda.
Wikipedia https://en.wikipedia.org/wiki/Temple_of_Antoninus_and_Faustina
Address 15 Via in Miranda, Roma 00186, Italy
Coordinates 41°53'31.484" N 12°29'11.823" E