The Ottoman Empire occupied Sinj during the 16th century, and that period of Ottoman rule had a profound effect on various aspects of life in the area. In addition to changing the administrative structure of the city, the Ottoman legacy is also visible in urban planning and architecture. The change of government was accompanied by social dynamics, including migration, religious interactions and cultural exchanges. After liberation from the Ottomans, Sinj came under the rule of the Venetian Republic. The Venetia ns undertook efforts to restore and build military structures, such as the Sinj Fortress, in order to further secure the defense of the city against possible Ottoman threats. During the Venetian rule, Sinj also experienced changes in urban planning, and th e Venetian system of administration was established. The culmination of contact between these two authorities occurred during the siege of Sinj on August 15, 1715. The successful defense against the Ottomans is attributed to Our Lady of Sinj, and this historical episode is marked by the traditional Alka knight game, which has been held for 300 years as a memorial to that day.