La lonja de la seda (The silk exchange) dates from the late 15th century. It was a hub of business and commerce built in response to the boom in the Valencian silk trade in the late 15th century, and also a tribunal was established in one side.
Nowadays it's a museum, and many of the original furnishing are still kept. La lonja has been a World Heritage Site since 1995.
@bruni No, they were waiting for a parade! The museum was closed at this hour.