The Freedom Monument honoring soldiers killed during the Latvian War of Independence (1918–1920).
The three stars represented the three parts of Latvia but there are four parts now, one having been a combination of two at the time.
The Soviets destroyed whatever symbols of Baltic independence it found but this monument survived because a well-known Russian woman convinced Stalin that it was meant to express the gratitude of the three Baltic countries to the Soviet Union. The guide who told this story followed it with a big “HA!”.