The Artillery Museum of Finland is a special military museum dedicated to the history of the artillery from the 15th century to the present day. It was located in Niinisalo from 1977 to 1997 and in 1997 relocated to Hämeenlinna.
There are almost a hundred guns, grenade launchers and rocket launchers of different make from 13 different countries. The gun collection of the museum is unique, the most comprehensive in the Scandinavia. As far as it is known there is no other museum outside Russia with a collection on Russian and Soviet artillery equipment as exhaustive as this.
The buildings of museum, Linnankasarmi, date back to the Russian regime, to the Autonomy 1809–1917. The construction of the barracks started in 1850 and was completed in 1913. The archaeological committee values Linnankasarmi quite highly as a traditional military area and prehistoric site because the medieval town of Hämeenlinna has once been here and its remains are still under the barrack yard. More over, Häme Castle is right next door and its century's long tradition includes also artillery.
Reference: Wikipedia
The Odeon of Herodes Atticus is a stone theatre structure located on the southwest slope of the Acropolis of Athens. It was built in 161 AD by the Athenian magnate Herodes Atticus in memory of his wife, Aspasia Annia Regilla. It was originally a steep-sloped theater with a three-story stone front wall and a wooden roof made of expensive cedar of Lebanon timber. It was used as a venue for music concerts with a capacity of 5,000. It lasted intact until it was destroyed and left in ruins by the Heruli in 267 AD.
The audience stands and the orchestra (stage) were restored using Pentelic marble in the 1950s. Since then it has been the main venue of the Athens Festival, which runs from May through October each year, featuring a variety of acclaimed Greek as well as International performances.