Karlis Rudolfs Leonids Blaumanis (1853–1908) was a Latvian , journalist and playwright.
He is considered one of the greatest writers in Latvian history and particularly a master of realism.
The building of a flat in Riga that he once lived has been converted to a memorial museum named partially in his honor, the Janis Rozentals and Rudolfs Blaumanis museum.