Complex sentence: After the 1755 Lisbon Earthquake, the palace required extensive reconstruction: under the direction of Manuel Caetano de Sousa, the building was remodeled and an elaborate chapel was constructed, with a rectangular vestibule and nave and polychromatic mosaics.
Split into simpler sentences: After the 1755 Lisbon Earthquake, the palace required extensive reconstruction. Under the direction of Manuel Caetano de Sousa, he remodeled the chapel with a rectangular vestibule and nave, with polychromatic mosaics.