Dozens of activists in Kazan, the capital of Russia's Tatarstan region, have commemorated the Tatars killed during the city's siege by Russian troops in 1552, despite the refusal by authorities to officially allow a mass gathering to mark the 451st anniversary of the Kazan Khanate's fall -- an event marked since the collapse of the Soviet Union. The activists gathered near the Soyembike Tower in Kazan on October 15 and held a collective prayer to commemorate the defenders of Kazan. In recent years, the Kazan authorities have been reluctant to allow activists to hold such events. To read the original story by RFE/RL's Idel.Realities, click here.