Johannine script (Portuguese: letra joanina) was a historical style of handwriting used in the Portuguese Royal Chancery starting around the reign of John I (1385–1433) that was used until the reign of Manuel I (1495–1521). It is, thus, a national variation of chancery hand, a form of blackletter. Notable scribes who wrote mostly on Johannine script include Álvaro Gonçalves (fl. 1385–1401), Gonçalo Caldeira (fl. 1386–1426), and João de Lisboa (fl. 1388–1431).