Complex sentence: Amato Ronconi was born in 1225 in Rimini into a noble household that possessed great wealth but was orphaned during his childhood; it fell upon his older brother Giacomo to care for him.
Split into simpler sentences: Amato Ronconi was born in 1225 into a household that possessed great wealth but was orphaned during his childhood. It fell upon his older brother Giacomo to care for him.