What is "sostro"

Sostro is a formerly independent settlement in the eastern part of the capital Ljubljana in central Slovenia. It was part of the traditional region of Lower Carniola and is now included with the rest of the municipality in the Central Slovenia Statistical Region. In addition to the main settlement, Sostro includes the hamlet of Betežica, located to the northeast along Betežčica Creek, and the hamlet of Glastavci in the wooded hills above Betežica. Sostro is also the source of the name of the Sostro District , the largest district of the capital.