Complex sentence: It was commissioned to be enlarged in 1552 on the remains of an earlier structure by Governor George Cabral, and the actual construction began in 1562 under the reign of King Dom Sebastião.
Split into simpler sentences: It was commissioned by Governor George Cabral to be enlarged in 1552 on the remains of an earlier structure. The actual construction began in 1562 under the reign of King Dom Sebastião.