Later , the Phoenician glassworkers exploited their glassblowing techniques .
Later , the Phoenician glassworkers set up their workshops in the western territories of the Roman Empire , first in Italy by the middle of the 1st century AD .
Later , the Phoenician glassworkers exploited their glassblowing techniques and set up their workshops in the western territories of the Roman Empire , first in Italy by the middle of the 1st century AD .