of large anti-communist protests. Climate Płock has an oceanic climate (Köppen climate classification: Cfb) using the isotherm or a humid continental climate (Köppen climate classification: Dfb) using the isotherm. Culture and religion The Museum of Mazovia provides exhibits and interpretation of the city and region's history. Płock is the oldest legislated seat of the Roman Catholic diocese; the Masovian Blessed Virgin Mary Cathedral was built here in the first half of the 12th century and houses the sarcophagi of Polish monarchs. It is one of the five oldest cathedrals in Poland. Divine Mercy The city is famous for the Divine Mercy Sanctuary, where the apparition of Jesus to Saint Faustina Kowalska took place, and the Divine Mercy devotion was revealed. Mariavite Church From the visions of Feliksa Kozłowska in 1893, the Mariavite order of priests originated, originally working to renew clergy within the Roman Catholic Church. Despite repeated attempts, they were not recognized by the Vatican and in the early 20th century established a separate and independent denomination. This site is the main seat of the Mariavite bishops. Their most important church was built here in the beginning of the 20th century; it is called the Temple of Mercy and Charity and is situated in a pleasant garden on the hill on which the historical centre of Płock is built, near the Vistula River. Poland in total has about 25,000 members of the Old Catholic Mariavite Church, as it is now named, with another 5,000 in France. A smaller breakaway church, the Catholic Mariavite Church, which has an integrated female priesthood (since 1929), has 3,000 members in Poland. Jewish history The Jewish presence in Płock (Yiddish: Plotzk) dates back many centuries, probably to the 13th and 14th centuries, when records include them. The Polish kings extended rights to them in 1264 and the 14th century, and provided continued political support through the centuries. At the beginning of the 19th century, their more than 1,200 residents comprised more than 48% of the city's population in what is considered the city's Old Town; through the century, their proportions ranged from 30 and 40 percent. It varied as German migrants were arriving in the region, and the area was becoming urbanized, as more people moved to the city. After Płock fell to Russia in the 19th century, it was part of the Pale of Settlement, where Russians allowed the settlement of Jews. As