Bishop Piotr Gembicki was one of the most meritorious benefactors of the Wawel Cathedral in Kraków. Among numerous goldworks donated personally by the bishop to the Cathedral there was a gold chalice in 1643, a gold monstrance in 1647, silver figures of Saints Sigismund and Ladislas (of approx. 20 kg each) in 1653, silver reliquaries of Saints Venerandus and Maschalina and a wooden coffin for relics, lined with velvet and decorated with silver fixtures before 1654.
Subsequently after his death the following valuables were given to the Cathedral by executors of Bishop's last will: a gold cross with diamonds to adorn a monstrance, a set of gold figures representing the Christ Crucified, the Saviour, St. Mary, St. John the Baptist and the Apostles, bought in 1656 from Queen Marie Louise Gonzaga, two silver altar sets (cross and six chandeliers), silver basin with a jug, silver crosier.
According to the Bishop's will also some mobilia from Kraków's Bishop Palace were granted to the Cathedral like "a pair of red velvet Italian chairs with gilded wood" and another "high gilded chair with statues of Saints Peter and Paul".
Monstrance donated by Bishop Piotr Gembicki to the Wawel Cathedral by Anonymous from Bologna and Kraków, ca. 1647, Wawel Cathedral Treasury.
Throne of Bishop Piotr Gembicki with statues of Saints Peter and Paul and his coat of arms by Anonymous from Kraków, between 1642 and 1654, Wawel Cathedral.