For almost 2 millennia Bukhara has been the center of Persian culture and education, and you can still see that today. There are countless madrasas and mosques as well as a nice fort. In contrast to Khiva, however, it does not feel like a museum.

The biggest mosque is (literally) Kalan mosque for 10000 people. We were the only tourists there:

Its minaret was the tallest building of Asia in the 12. century, and it served multiple purposes: the muezzin was calling for prayer from the middle of the tower, the upper levels were used as watchtower to detect fires and as a lighthouse for caravans approaching Bukhara.

The nicest building of the town, in my opinion, is the Samanid mausoleum, however. Only one type and size of brick was used to create all these ornaments: