You can contact the author of microminiatures by e-mail:

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The permanent Microminiatures exhibition by Mykola Syadristy
is at the National Kyiv-Pechersk Historical and Cultural Preserve at:
Lavrska street, 9, Kyiv, building 4

Information about the Microminiatures exhibition by Mykola Syadristy
is available on the website of the National Kyiv-Pechersk Historical and Cultural Preserve on the following link:
https://kplavra.kyiv.ua/ua/node/1565