The Library Building - Fig. 1 - Plan of the first floor of the old library. Adapted from Wladislav Masiewiscz's vault-level plan of York Minster, c. 1977, published in S. Brown, 'Our Magnificent Fabrick'. York Minster: An Architectural History c.1220-1500 (Swindon: English Heritage, 2003), plan 2; © Crown copyright.EH).