After the 1381 renovation, the building had eight naves, 8.4 m high and 8.4 m wide. The naves were, approximately, 60 m long, consisting of 17 columns 77 cm wide and 6 m high. Thanks to a written record of the time we know that four new storage areas were built. Ashlar from the nearby mountain of Montjuïc was used for the construction, with sand from the beach in front of the shipyard, wood from the Baix Ebre and Gavarres and ropes and tiles from Valencia. During the rule of Alfonso V of Aragon, the shipyard experienced its highest activity. In 1423, twelve galleys were built simultaneously. In 1571, the royal galley of John of Austria, commonly known as the Real, was built at the shipyard. This galley was the flagship at the Battle of Lepanto. There is a reproduction of this galley at the Barcelona Maritime Museum.