In the heart of Valencia's historic center, facing the Central Market and very close to the church of Santa Caterina, stands a Gothic building that puzzles the visitor. One might think it is a temple, but in reality it is the Merchants' Exchange. At the entrance, satirical and obscene figures abound, such as men and women touching their genitals and birds spicing butts. At the exit door, on the other hand, everything is harmony. The writer Juan Francisco Ferrándiz (Cocentaina, 1971) is so fascinated by this Gothic building that it inspired him to write a book about its construction in the late 15th century: La Llotja de la seda (Silk Exchange) (Rosa dels Vents / Grijalbo), which Josep Alemany and Imma Falcó have translated into Catalan.