The touristic highlight of Pula is the Roman amphitheatre. This is a very well preserved arena which was constructed between 27BC and 68 AD. It is built entirely out of local limestone and is nowadays used as a venue for concerts with seating for up to 20000 people. The Pula arena has an elliptical shape measuring 132m x 105m, extending from northeast to southwest. The seating area is on the eastern side and is on the slope of a hill. Restoration of the arena started during the Napoleonic period and continued in the Habsburg period.