Unable to answer "What kind of memorial is this?" for https://osm.org/node/6691852894 via StreetComplete 45.2:

It is not a memorial, it is a trading dome. Toki Zargaron as you can see in this Web: https://www.people-travels.com/uzbekistan-cities/bukhara/sightseeing-in-bukhara/trading-domes-of-bukhara.html