Complex sentence: Prior to 1988, the bronze statue of the Immaculate Conception in the main altar, by renowned Italian sculptor Maestro Enzo Assenza, was painted gold until 1988 (though the twelve star halo-aureola is solid gold).
Split into simpler sentences: Prior to 1988, the statue of the Immaculate Conception in the main altar was painted in gold. The Immaculate Conception life-size solid bronze statue inside the shrine was made by renowned Italian sculptor, Maestro Enzo Assenza, was painted gold until 1988 (though the twelve star halo-aureola is solid gold).