Complex sentence: During this period, Antonello da Messina moved to Alcamo for three years (around 1438--1441) in order to learn the tanning techniques from the tanner master Guglielmo Adragna di Alcamo, in fact the town was an important pole of development for commerce and handicraft.
Split into simpler sentences: During this period, Antonello da Messina moved to Alcamo for three years (around 1438--1441) in order to learn the tanning techniques from the tanner master Guglielmo Adragna di Alcamo. In fact the town was an important pole of development for commerce and handicraft.