Heinrich Johann Denier,[1] russified as Andrey Ivanovich Denyer,[1] (1820, Mogilev - 3 March 1892, St. Petersburg) was a Russian photographer of Swiss descent, particularly known for his portraits.
After completing his primary education in Mogilev, he enrolled at the Imperial Academy of Fine Arts, where he studied history painting under the tutelage of Karl Bryullov.
In 1860, he was awarded the title "Photographer of Their Imperial Majesties", which allowed him to place the state emblem on his signboard.
Several artists and photographers who would later become famous worked as retouchers in his studio, including Ivan Kramskoi and Mikhail Tulinov [ru].
He was awarded a large gold medal for his assistance in organizing the photography pavilion at the Polytechnic Exhibition [ru] of 1872.