I'm moving to Warsaw for one week so that's the place which will be featured in our schedule. Warsaw Summer Jazz Days is one of the biggest Jazz festivals in Poland, it's program fits well both mainstream, free, big international stars as well as strong polish representation. I think the names on the list (especially the one in bold font) need little introduction on my part.
Here's the program of the festival
15.07. John Zorn at 60 - A run through a variety of Zorn's project as he celebrates his 60th birtday. The groups will be:
Summer Jazz Festival at Piwnica Pod Baranami continues with the daily concerts but I think that of much more interest are the three concerts at Alchemia, part of the Rozstaje Festival (Crossroads) which shows contemporary music to reinterpret folk culture.
20.07. Night of Jazz