The Engelhardt Observatory was established by
Dmitry Dubyago. In 1897, astronomer
Vasily Engelhardt donated equipment to
Kazan University to set up the observatory, which officially opened on September 21, 1901. The main building was designed by architect Fyodor Malinovsky. After Dubyago's passing, he was laid to rest in a crypt built on a mound, designed by architect
Karl Hermann Ludwig Müffke. In 2014, Engelhardt's remains were also reinterred in this crypt. In 1908, a stone tower with a rotating dome was constructed for a
heliometer, followed by a pavilion for an
astrograph in 1914. In 1929,
Avenir Yakovkin, the observatory's director, acquired a 120-mm
Zeiss lens and an objective prism for the Heide astrograph, enabling the photography of star fields and the capture of stellar spectra. Yakovkin's extensive heliometer observations led to refined measurements of the Moon's physical
libration. In 2021, the observatory museum was opened. Much of equipment donated by Engelhardt is still
in situ and may be seen. File:V. P. Engel'gardt Astronomical Observatory, before 1909.jpg|Engel'gardt Observatory. File:Refractor telescope, V. P. Engel'gardt Astronomical Observatory, before 1909.jpg|Refractor. Meridian circle, V. P. Engel'gardt Astronomical Observatory, before 1909.jpg|Meridian circle. South meridian sign, V. P. Engel'gardt Astronomical Observatory, before 1909.jpg|South meridian sign. == Zelenchukskaya Station ==