In the centre of the square, this large trading hall was built in Gothic style in the 14th century and rebuilt in Renaissance style in the 16th. The ground floor is an arcade filled with souvenir shops: this is open 24 hours even when the shops are closed. Upstairs is the Gallery of 19th C Polish Art, a branch of the National Museum. The Enlightenment, Romanticism, early Nationalism, Realism and Impressionism are the main styles of the permanent collection; plus rotating exhibitions. There are also extensive underground galleries with changing exhibitions, enquire at the upstairs gallery.
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Most of the Gothic / Renaissance Town Hall was demolished in 1820, but the tower survives, now a branch of the City Museum. You can climb to the observation deck on the top floor, and peer into the workings of the clock, now radio-synchronised.
Scena pod Ratuszem
Small theatre in Town Hall's basement is part of People's Theatre (Teatr Ludowy) based in Nowa Huta.
Kościół św. Wojciecha
At the south corner of the square just before the start of Grodzka, this is one of the oldest churches in Central Europe, with a wooden church recorded from the 10th C. It was rebuilt in the 11th C in Romanesque style and enlarged in the 17th C in baroque style.
Bazylika Mariacka
Built in Gothic Brick from the 14th C, with two unequal towers facing the main square. The hejnał is played from the towers every hour and on Polish Radio at noon, commemorating the trumpeter slain as he sounded the alarm. There's a soaring interior with a magnificent altar by Veit Stoss (1477-89), plus another with a stone crucifix by Stoss. The wall paintings are by Matejko, Wyspianski, and Mehoffer.
Leaving aside Wawel cathedral this church and St Francis church are probably the two most impressive in Krakow.
Pałac Krzysztofory
The main building. Usual historical museum stuff: armour, swords, etc. Every year after Christmas there is an exhibition concerning local tradition: Krakow szopka (characteristic nativity scene where historical buildings of Kraków are used as backdrop for the Nativity of Jesus.)
Cinema in a beautiful palace with three screens. Similar to ARS with their selection of films. They have special screenings of Polish films with subtitles in English.