The Popper (Bocian) Synagogue was built in 1620 at 16 Szeroka Street in Kraków's Kazimierz district. Due to its small size, it is referred to as the Little Synagogue.

It is built in the Baroque style. Large buttresses support it. It is difficult to find, as it was built between two townhouses. The synagogue was built of brick and stone on a rectangular plan. Inside is a rectangular prayer hall, with a barrel vault. It is entered through a small vestibule. A high wall with three gates encloses the courtyard. It was reconstructed in 1966. The wall is topped by a moulded cornice raised semicircularly in the central section. The two semi-circular side gates are of equal height. The central entrance is rectangular. Above the central gate is a plaque with a reconstructed inscription in Hebrew of who built it and when. Above the central gate is a plaque with a Hebrew reconstructed inscription stating who built it and when. Popper's name was widely known in the merchant zones of central Europe. He was to build a cheder, or Jewish religious school, next to the synagogue.

The richly furnished synagogue was one of the most magnificent in Kraków at the time. The costly upkeep greatly impoverished the heirs, so they gave it to the Jewish Community in Kazimierz. However, the municipality authorities did not care very much about it. It was not until 1813 that the building was restored. In the following years, a two-storey extension was added as a babinets. The roof, stairs and porches were reconstructed. It was also at this time that the gate was built. At the end of the 19th century, a floor was added over the prayer hall, and a wooden staircase was erected to lead to the babinets. One window in the vestibule on the ground floor was converted into an entrance. The walls and barrel vault in the prayer hall were decorated with paintings. They are now painted in white.

During World War II, the Germans completely destroyed the historic furnishings of the interior: the frame of the Torah niche, the iron grating of the bimah, the treasury and much more. Only the wooden altar doors, covered with woodcarving decoration, have survived. The images of a lion, eagle, leopard and deer depicted on them were meant to symbolise strength and human ability. After the war, they ended up in a museum in Jerusalem. Thanks to the efforts of the Congregation of the Mosaic Faith in Kraków, the synagogue was quickly renovated. After the war, Jewish displaced persons from the Soviet Union lived in the women's quarters for several years.

The building originally adjoined the city wall on the east side. In 1827, renovation changes were made to create a gate enclosing the synagogue courtyard and yard from Szeroka Street. The only surviving element of the original decoration is the wood-carved door of the Torah ark wardrobe, now stored in Jerusalem. Today, the building houses a bookshop.

In 1964, the conservation of the building was completed. In fact, everything has been changed there. The single-storey extension, staircase and wooden porches have been removed. The niche above the Torah ark and the entrance to the vestibule were bricked up. The interior was covered with a wooden barrel vault and a wooden staircase was put on the wall of the prayer hall. With permission from the Jewish community, the former synagogue houses an Old Town Youth Cultural Centre branch. Art workshops are held here during the Jewish Culture Festival. The building underwent further renovation in 2005. It houses an art studio for children and young peopleand also hosts exhibitions by local artists. In addition to art classes, there are courses in architecture, artistic textiles and stained-glass techniques. Lectures on history, art history, concerts, and book promotions are held here.

As you enter the synagogue, you may notice children's drawings on the walls and see people dancing to the rhythm of Israeli music.