Complex sentence: Between 1867 and 1868, many paintings coming from further suppressions were added, in 1875 it was opened regularly for the public, in 1882 the Gallery became autonomous and, in 1884 Zambeccari Collection was acquired.
Split into simpler sentences: Between 1867 and 1868, many paintings coming from further suppressions were added. In 1875, the pinacoteca was opened regularly for the public, in 1882 the Gallery became autonomous and, in 1884 Zambeccari Collection was acquired.