The Museum of John Paul II Collection () in Warsaw, also known as the Porczyński Gallery or Carroll-Porczyński Collection, is a museum dedicated to its painting collection, which is housed in the building of the former stock exchange and National Bank. It is considered one of the finest collections of European art in Warsaw. The collection includes around 400 exhibits, mainly Old Masters and the Impressionists, along with some copies of masterpieces of European painting. History Zbigniew and Janina Porczyński have been amassing the collection since 1981. In the first three years, the couple concentrated on adding paintings with biblical themes but later portraits and impressionistic works were added. In 1986 the couple transferred about 400 exhibits to the Archdiocese of Warsaw and the Polish nation and created a foundation to supervise the collection. The first part of the collection was displayed publicly on 5 November 1987 at the Museum of the Warsaw archdiocese (Muzeum Archidiecezji Warszawskiej) at Solec Street. The second part was displayed from 14 September to 30 December 1988. In 1989 the beneficiaries of the foundation, the Primate of Poland and the Polish Arts and Culture Ministry, decided to create a museum to provide a permanent display of the collection. The city of Warsaw provided the collection with a permanent home in a building designed by Antonio Corazzi in 1825 - the former stock exchange rebuilt after the Second World War destruction. Criticism Since 1987 various art experts put in doubt the authenticity of many important works in the collection. The Polish art historians Mieczysław Morka and Waldemar Łysiak contributed several times to this criticism. A painting signed by Alfred Sisley (River landscape) is a forgery by Tom Keating. Apart from forgery allegations and unclear financing of the foundation by the public sector, some other activities of the foundation were criticized (the organization of commercial events in the museum premises). Collection The collection is displayed in eight rooms and arranged thematically: Impressionists, mythology and allegory, portraits and self-portraits (in the two-story hall "Rotunda"), mothers and children, effigies of the Madonna and Child, biblical themes, still lifes and landscapes (in the gallery) and a room dedicated to the monumental painting Baptism of Lithuania (1889) by Wojciech Gerson. The majority of the collection consists of works by British, Dutch, Early Netherlandish, Flemish, French, German, Italian, Spanish and Swiss Old Masters, their pupils and followers. Among the artists represented are