sentence1: South of the baths begins the Old Appian Way (Via Appia Antica), built in 312 b.c. for the Roman legions who marched to coastal Brindisi to set sail for the Levant and North Africa.
sentence2: The Old Appian Way (Via Appia Antica) begins south of the baths; it was built in 312 b.c. for the Roman legions, who marched to coastal Brindisi to set sail for the Levant and North Africa.