Prague's festival of new circus, Letní Letná (held in Letná Park) has a lot of free outdoor work and a few ticketed indoor/tented performances. There's an emphasis in the morning/afternoon on workshops and children’s shows and the longer works go on in the evening.
For 2011, the festival's eighth year, the big imports are Cirkus Cirkör's Wear it like a crown and Compagnie XY's Le Grand C, but there's also, perhaps more interestingly, local work: Komedianti a kejklíři's Komediantský večer, a 'nonperformance' from a group of friends including the Czech Republic's only tightwire walker; Alena Dittrichová's Ate Madrugada, a Czech/Portuguese/Spanish work inspired by a poor fishing village eking out a living from the tourist trade; and Bilbo compagnie and Sacra Circus' Talíře/Taniere, an 'amoral clown show' providing 'destructive relaxation' through the ancient clown art of plate-smashing.