The Church of St. Adalbert is one of the oldest stone churches in Poland. The Church was built in the 11th century and named after the martyred missionary Saint Adalbert whose body was bought back for its weight in gold from the pagan Prussia and placed in Gniezno Cathedral by Boleslaus I of Poland. The interior of the church is cramped, relative to its larger exterior. The floor level is situated under the present level of the Square, which reflects the overlaying of the subsequent surfaces of the plaza with pavement originally adjusted to the two already existing churches (St. Wojciech/Adalbert and St. Mary's Basilica). The church was partially reconstructed in the Baroque style between 1611-1618.
According to the Archeological Museum of Kraków, the oldest relics reveal a wooden structure built at the end of the 10th century and followed by an original stone church constructed in the 11th century, as seen in the lower parts of the walls. These walls became a foundation for a new church built around the turn of the 11th and 12th centuries from smaller rectangular stones. Since the level of the plaza, overlaid with new pavement, rose between 2 to 2.6 meters, the walls of the church were raised up in the 17th century and then covered with stucco. The new entrance was built from the west side and the church was topped with the new Baroque dome. The restoration of the church conducted in the 19th century led to the discovery of its Romanesque past.
At present, the walls of the church are unearthed to show their lowest level. On the south side there's a Romanesque portal and corresponding stone step. The crypt of the church has been adapted by the Archeological Museum as a small Museum of the History of the Market Square showing a permanent exhibit of 'The History of the Kraków Market.'
References:Rosenborg Palace was built in the period 1606-34 as Christian IV’s summerhouse just outside the ramparts of Copenhagen. Christian IV was very fond of the palace and often stayed at the castle when he resided in Copenhagen, and it was here that he died in 1648. After his death, the palace passed to his son King Frederik III, who together with his queen, Sophie Amalie, carried out several types of modernisation.
The last king who used the place as a residence was Frederik IV, and around 1720, Rosenborg was abandoned in favor of Frederiksborg Palace.Through the 1700s, considerable art treasures were collected at Rosenborg Castle, among other things items from the estates of deceased royalty and from Christiansborg after the fire there in 1794.
Soon the idea of a museum arose, and that was realised in 1833, which is The Royal Danish Collection’s official year of establishment.