STATUE OF AN EMPEROR
Marble
H: 267 cm.
Roman Period, 2nd century A.D.
Perge
A statue of a Roman Emperor in armor, caved in a fine grained white marble. This statue lacks a portrait head or any attribute to identify which Roman Emperor it represents.

Source: A pdf of the museum I found on the internet

The statue stands in front of the museum. Hence the wise words in its background, by Atatürk. Google translate puts it as "The way to have a home, it occurred to know the historical events in the land, and recognition through being born with civilization", which is obviously rubbish. I cannot translate it myself, but I think the drift is: to properly be an inhabitant of a country, one has to know its history and have knowledge of the civilizations it contained.