Complex sentence: In 1835, the (Verschönerungs--Verein zu Bromberg) founded on the east side of Gdańska Street a tree nursery towere grown to brighten up the eastern side of Gdanska Street.
Split into simpler sentences: In 1835, the (Verschönerungs--Verein zu Bromberg) founded on the east side of the street. Nursery trees were grown to brighten up the eastern side of Gdanska Street.