Lucky you!!
In addition, the small musuem dedicated to home town boy, Alphonse Mucha, one of the greatest Art Nouveau artisits, Wencelas Square and its museums, The Astronomical Clock and Art Nouveau City Hall.
Also, Czech Beer -- Pilsner Urquel, Budweis (August Busch's inspiration/rip off when devising Budweiser), and my favorite Gambrinius.
Of course, you can't refuse a great Duck, Goose,Pork or some form of wild game dinner with that beer!
BTW, where are you staying?