Kazan Cathedral was considered one of the most important churches in Moscow. Annually on the anniversary of the liberation of Moscow from Poland-Lithuania, a solemn parade led by the Patriarch and the Tsar carried a processional cross from the Kremlin. By the end of the 17th century, the church building was expanded and received a bell tower and a redesigned entrance. Numerous other renovations of the cathedral were undertaken during the imperial period, notably during 1801, 1805, and 1865, and much of the original design was lost behind later additions.