The Asland Cement Museum in Castellar de n’Hug and the National Science and Technology Museum of Catalonia (mNACTEC) are for the third year organising the technical seminar on "Catalan Vaults" on 4 and 5 October in Castellar de n’Hug. The aim of the seminar is to promote and showcase the heritage value of this construction technique, and to serve as a forum for reflection by speakers and attendees about Catalan vaults as an exemplary case of a traditional technique that remains relevant today.