In the former Roman Catholic St John's Cathedral in Venden, now an Evangelical church, there is a gravestone monument to Bishop Andrzej Patrycy Nidecki (born on 27 November 1522 in Oświęcim, died on 2 January 1587 at the castle in Wolmar, Latvia) - a humanist, philologist, author of polemical anti-Reformation writings, publisher and commentator on Cicero, friend of Jan Kochanowski.

The clergyman was royal secretary to Sigismund Augustus, later to Anna Jagiellonka and Stefan Batory, and in 1585 was appointed to the Bishopric of Vendee. He died on 2 January 1587 at the castle in Volmar (Lat. Valmiera), while preparing to go to the Coronation Sejm. He was buried in the church of St John in Wenden (Polish: Kieś, Latvian: Cēsis), although in his earlier will he wished to be buried in Oświęcim by the grave of his parents. In Wenden, a magnificent gravestone monument with a recumbent figure of the deceased in bishop's attire was founded for him.

Commissioned by the Ministry of Culture and National Heritage, thanks to the help of the Polish Embassy in Riga and the kindness of Pastor Didzis Kreicbergs and the Latvian conservation service, in 2007 the Polish conservators Bartosz Markowski and Krzysztof Jurków prepared expert reports on the state of preservation of the tombstone of Bishop Andrzej Patrycy Nidecki of Wenden and the coat of arms of his successor, Bishop Otto Schenking (1554-1637). These valuable monuments are located in the former cathedral and now St John's Lutheran Church in Cēsis. A year later, by decision of the Minister of Culture and National Heritage, at the request of the TERPA Foundation for the Protection of the Common Cultural Heritage, funds were granted from the Programme "Protection of Cultural Heritage Abroad" to finance conservation and restoration work on the late Renaissance tombstone of Bishop Nidecky. The work was carried out at the end of May and the beginning of June 2008 by Bartosz Markowski, Krzysztof Jurkow and Aleksandra Trochimowicz, certified conservators of works of art, graduates of the Academy of Fine Arts in Warsaw.

The same team of Polish conservators returned to St John Cēsis Church in 2011. Thanks to funding from the Ministry of Culture and National Heritage, the tombstone of Anna of Wrzosowice, dated 1591, underwent conservation work. Judging from the inscription, it commemorated the daughter of Jan, tenutary of Krzepice, from 1586. the wife of Prokop Pieniążek of Krużlowa (d. 1589), a knight of Jerusalem, hussar rotmistrz, starosta of Wenden, granted lease of Wenden for life by Sigismund III (see Polski Słownik Biograficzny vol. XXVI). In addition, the executors of the will are mentioned in the partially illegible part of the inscription: Maciej Leniek of Rokitnica (d. 1609), castellan of Dorpat, listed in 1590 as a tax collector in Wenden (Kieskie), listed here with the title of starost of Novogrudok-inflank (wider: PSB vol. XVII), and Wawrzyniec Węgierski, a starosta of Rumbor.

According to information obtained by conservators at St John's parish and the local conservation office, as well as on the basis of a thorough reconnaissance of the object during conservation work, the tombstone was moved from its original place in the church floor in the first half of the 20th century, probably in the 1930s. The reason for moving the slab of Anna of Wrzosowice, as well as other tombstones, was the constant dampness of the church floor and walls, caused by groundwater seepage. Since the 1930s, the tombstone has been in its present location, i.e. built into the east wall of the north nave of St John's Church.