Search the Five College Libraries Catalog for book-length works on British History. Helpful subject keywords to combine are Great Britain history along with Early Modern, Renaissance, Elizabethan, Jacobean, 16th century, or 17th century.
EEBO: Early English Books Online Full-text of works on every topic (literature, history, medicine, law, etiquette - you name it!) originally published between 1475 and 1700. A great source for finding out about the time in which plays were written and performed. Digital images reflect the way the works appeared in their original printed editions.
ARTStor - Digital image collection, mostly Art History but also contains images pertaining to costumes and performing arts.
Search the library catalog for photo essays, books of photography and art. The subject term often used to describe these is “pictorial works.” For example, you might do a subject keyword search on the terms london theater pictorial works to find books of images depicting theaters in London.
Map of Early Modern London Actually four projects from the University of Victoria: "a digital Map and gazetteer based on the 1560s Agas woodcut map of London; an Encyclopedia of London people, places, topics, and terms; a Library of marked-up texts rich in London toponyms; and a versioned edition of John Stow’s Survey of London."
ShaLT (Shakespearean London Theatres) Joint project of De Montfort University and the Victoria and Albert Museum aimed at increasing public awareness of the known sites of London theaters that existed in Shakespeare's time. Includes " a map, a printed ShaLT Guide, interactive software, public talks, and downloadable short films that will enable the public to travel to the modern London locations of these theatres and learn about them."