Complex sentence: Prior to this date, artifacts was set up in the Department of Archives in Goa by the Archeology & Museum unit, and thereafter a small Museum was opened to the public on September 29th, 1977 in a rented building at St. Inez, also in Panjim.
Split into simpler sentences: Prior to this date, artifacts was set up in the Department of Archives in Goa by the Archeology & Museum unit. Thereafter a small Museum was opened to the public on September 29th, 1977 in a rented building at St. Inez, also in Panjim.