Yanukovych has not been back to Ukraine since fleeing for Russia in 2014.
The Ukrainian government claims to have uncovered weapons used to kill over 100 pro-European protesters in 2014.
Kiev wants a European future, but LGBT rights remain neglected.
As part of the memorial service, Russian liberals had planned to screen a documentary about Maidan.
Having failed to knock out Ukraine with one big punch, Putin hopes to kill it with a thousand cuts.
The document discusses co-opting regions of east Ukraine before last year's Euromaidan uprising.
Thousands of Russian social media users have been mockingly comparing the unrest with last year's Euromaidan uprising