How many browser tabs do you have open right now? Be honest. This image shows a book wheel. This old tech is basically the medieval equivalent of having multiple browser tabs open. The user could keep multiple open books open and rotate the carousel to consult them individually. Very handy. . . . 🏷: #ArchivesOldSchool #ArchivesHashtagParty #GettyMuseum #Manuscripts #MedievalArt #Medieval #MiddleAges #Books #ArtHistory