The historic Clam-Gallas palace is running free tours for the holiday, along with many other establishments. Reservations required because it will be a popular destination.
Over 100 light sculptures connect space with the festivities after dark. Better than the repetitive Christmas markets, and there's mulled wine too! Open daily from 16:00 to 19:00.
It's not every day you can enjoy theatre performances in English in Prague. The Shakespeare company performs The Merchant of Venice for one night only!