Rickmer Rickmers is a sailing ship permanently moored as a museum ship in Hamburg harbor.
Rickmer Clasen Rickmers, was a Bremerhaven shipbuilder and Willi Rickmer Rickmers, led a Soviet-German expedition to the Pamirs in 1928. Wikipedia
More information on the history of the ship at:
https://en.wikipedia.org/wiki/Rickmer_Rickmers