Complex sentence: After the Spanish Conquest, a trapiche (mill) was built in Chapultepec, where wheat and maize were processed into fhis mill became so important that it was later called el Molino del Rey ("the King's Mill").
Split into simpler sentences: After the Spanish Conquest, a trapiche (mill) was built in Chapultepec, where wheat and maize were processed into flour. This mill became so important that it was later called el Molino del Rey ("the King's Mill").