From the Wikipedia:

Monumentum Ancyranum refers to the Temple of Augustus and Rome in Ancyra (modern Ankara, Turkey), or to the inscription Res Gestae Divi Augusti, a text recounting the deeds of the first Roman emperor Augustus, the most intact copy of which is preserved on the walls of this temple.

The temple was built between 25 BC - 20 BC after the conquest of central Anatolia by the Roman Empire and the formation of the Galatia province, with Ancyra as its administrative capital.