以前利用したホテルから招待が来たのですが、いきなり来いと言われても行けないので、せっかくなのでこちらにイベント登録してみます（何つー理由じゃ）。

カレル橋の基礎がおかれて650周年だそうで、なにかセレモニーがおこなわれるようです。以下、ホテルからの案内文（文字化けしてるのはチェコ語だからです、すみません）。

Visitors can experience medieval knight tournaments, listen to medieval music, visit typical medieval markets etc. There will be a historical parade from the Old Town Square to Charles Bridge where Emperor Charles IV. will place again the first stone. The celebrations are going to take place not only on the Bridge, but also in its close surroundings - for example in Kampa, on the K?i?ovnick? square, on the Novotn?'s footbridge or directly on Vltava river on a floating stage where many concerts are going to take place. Individual projects, such as theatre performances, music concerts, art performances or visual animations should represent various periods from Medieval Times up to the present.

http://www.euroagentur.com/anniversary-charles-bridge-prague.html