to their drawings between 1931 and 1940. The outbreak of World War II interrupted the full completion of the church, especially of the interior. Only the construction work was finished. The foundation stone was laid on 8 May 1931, when it was also consecrated by Serbian Patriarch Varnava. The construction fully began in 1932 and the exterior was finished in 1939. Divine service took place in the new church during the war in 1941 and after it until 14 November 1948 in the adapted narthex of the church. On that date the church was consecrated (by Serbian Patriarch Gavrilo V) and the church opened for divine service. There were plans to decorate the whole interior with frescoes. The external walls are in two colors of natural materials in the Serbo-Byzantine style. The church bell tower is a part of the church itself on the west side. Due to the already urbanized area around it, the construction couldn't follow the strict church canon concerning the east-west position. In order to fit into the existing city grid, Patriarch Varnava gave a special permit for the new church to deviate for 10 degrees from the canonical rule. That way, the main entrance came in line with the Resavska Street, across it. The Gračanica Monastery was used as a model for the new church. Until the Church of Saint Sava surpassed it, St.Mark's Church was the largest Serbian church. It is considered one of the most beautiful edifices of the sacral architecture in the Serbo-Byzantine Revival style. More than seventy years after the beginning of its construction, St. Mark's Church has not been completed. This relates primarily to its interior, decorating, fresco painting, appropriate lighting, acoustics, heating, and ventilation. After World War II little was done in the church itself for objective reasons. Above the entrance door to the church on the external façade is an icon in a mosaic of the Holy Apostle and Evangelist Mark, the work of Veljko Stanojević in 1961. The floor in the church is from 1974, while the floor of the soleia (area in front of the iconostasis and the altar (sanctuary) was done in marble in 1991. The Anniversary Day of Operation Storm, held for mourning killed and exiled Serbs from Croatia and Bosnia and Herzegovina, is held on August 5 in St. Mark's Church. In November 2017 a complete rearrangement of the plateau, which functioned as