1. Harley MS 2653 Reference (shelfmark): Harley MS 2653 Title: Ianua Scope & Content: This manuscript contains the earliest surviving copy of the popular school text known as Ianua (The Door). Contents: ff. 1r-41r: Ianua. Collection Area: Western Manuscripts Languages: Latin Date Range: 2nd half of the 12th century Extent: 1 volume