Edited on the occasion of the 50th anniversary of the creation of the Historical Archive of the COAC, it includes a selection of the nearly two million documents that it treasures in its document deposits. The publication collects 155 drawings representative of a wide temporal scope that goes from a survey of the mountain of Montserrat -with the location of buildings from 1778- to the present day. All are accompanied by a short technical review and the architect’s basic biographical data.