During the first phase of construction (1255–1260), the main shrine and auxiliary shrines were built, under the direction of Villard de Honnecourt. The first stage of the construction of the main church of Buda is closest relative to the Lyon Cathedral. The group of masters consisted of the builders of the Cistercian Monastery of Tišnov, Czech Republic, who during the master migration after the Mongol invasion the cousin of king Béla IV, Agnes of Bohemia, traveled to Hungary. The reasons for its disintegration around 1260 are unknown.