Overview Forum Romanum 

In the background, you see the Colosseum already.
The columns on the left, with the stairs in front, indicate the Temple of Antonius and Faustina, his wife (141 AD). It now is part of the church San Lorenzo in Miranda. Some way to go to church! 

Directly after this temple (right of it on the photo), you see the Temple of Romulus, made in de 4th century AD. It's now part of the church Santi Cosma e Damiano. 

The arch in the background on the right is the Arch of Titus, erected 81 AD by emperor Domitianus to celebrate the victory of Titus, his brother and Vespasianus, his father, in Judea.