Complex sentence: On the southeast corner of the square stands the green cast-iron Commercial Edwards building, which was built in 1893 and going east is the 1769-finished colonial building of the Casa Colorada, which houses the Museum of Santiago.
Split into simpler sentences: On the southeast corner of the square stands the green cast-iron Commercial Edwards building, which was built in 1893. East of that is the colonial building of the Casa Colorada (1769), which houses the Museum of Santiago.