Normal clocks goes from 1 to 12 but in Solothurn it's different. The 12 is missing. Nobody really knows but some say it goes back into the middle ages.
Towers - Clock, Objects - Misc, Objects - Roadside Attractions
The number 11 is very common in Solothurn. The St. Ursus Cathedral has 11 bells and 11 altars and it took 11 years to build.
A local brewery is the Öufi Bier (11 Beer)