ARQUA Museo Nacional de Arqueología Subacuática is the institution in charge of studying, valuing, investigating, preserving, disseminating and protecting the Spanish underwater cultural heritage. It is also home to the Permanent Observatory for the National Plan for the Protection of Underwater Cultural Heritage. These tasks are carried out in collaboration with the different regional governments and its research centres and in cooperation with the States who partner with the UNESCO Convention. Furthermore, the ARQUA has recently taken charge of the Odyssey’s treasure. The Nuestra Señora de las Mercedes frigate collection, which consists of more than 570,000 gold and silver coins from the late 18th century and the beginning of the 19th century. https://www.murciaturistica.es/en/museum/arqua-museo-nacional-de-arqueologia-subacuatica-132/