As a city that grew up on the major trading routes of medieval Europe, it is no surprise that Krakow has become a cosmopolitan city. It was at its most diverse in the years before World War II when the Jewish population of the city numbered around 60,000. Today the Jewish history of Krakow is once again celebrated as an integral part of its identity. Outdoor kosher restaurants in Kazimierz attract diners from all backgrounds, with klezmer musicians frequently performing in the summer evenings. The Old Synagogue with its hauntingly beautiful prayer room is now a museum, while the Galicia Jewish Museum is a welcoming space where large photographs depict the rich Jewish heritage of this corner of Europe.