Prague has historically significant landmarks like the astronomical clock from 1410 and Prague Castle dating to the 9th century. The document also summarizes information about several other cities and towns in the Czech Republic such as Český Krumlov, Třebíč, Brno, Lednice Castle, Olomouc, Zákupy and its castle, and Terezín. Many of these places are recognized on the UNESCO world heritage list for their cultural or historical value.