It was here, at the Republic of Amalfi's shipyard, that the vessels which maintained power over the Mediterranean in the Middle Ages were constructed. Established in the 11th century, the shipyard was restored in the 13th century and in its heyday it produced galleys up to 40m (131 ft.) long. Only half of the building remains today -- the other half, which reached into the sea, was destroyed by a series of storms in the 14th century. No matter; you can still see the building's beautiful architecture, with its pointed arches and cross vaults resting on stone pillars. Between the Arsenale and the Porta della Marina is a tile panel depicting Amalfi's commercial empire in the Middle Ages; it was created by the artist Renato Rossi in the 1950s.