With over twenty centuries of history, it is the Cradle of Modern Parliamentarism, as designated by UNESCO, because the first known parliaments in history were held in the Royal Basilica of San Isidoro in 1188. The site of this important historical event can be visited today, along with the Pantheon of the Kings, known as the Sistine Chapel of Romanesque art. The city boasts a world-class cultural and architectural heritage, perfectly integrated with the modern infrastructure of a dynamic city offering all amenities.

Leon has always maintained a close relationship with the pharmaceutical and veterinary sectors and more recently with new technologies, which together with having two reference facilities for holding conventions and congresses such as the modern Congress and Exhibition Palace of Leon with more than ten thousand square meters and the City of Leon Auditorium, make the city a magnificent destination for this type of event.