Complex sentence: When the last of the Medicis died in 1737, the garden began to be altered by its new owners, the House of Lorraine; the labyrinth was demolished and the statue of Venus was moved to the Villa Petraia.
Split into simpler sentences: When the last of the Medicis died in 1737, the garden began to be altered by its new owners, the House of Lorraine. The labyrinth was demolished and the statue of Venus was moved to the Villa Petraia.