Complex sentence: Around year 1000, the temple dedicated to Asclepius, Greek god of medicine, was built in Tiber Island which was later replaced by a shelter for beggars, poor, and sick.
Split into simpler sentences: Around year 1000, the temple dedicated to Asclepius, the Greek god of medicine, was built on the Tiber Island. The temple was later replaced by a shelter for beggars, poor, and sick.