[12] One of the earliest known alba amicorum is described by Heinzer, ‘Das Album amicorum (1545 – 1569) des Claude de Senarclens’; another early one is kept today in the Getty Research Institute; see Brafman, ‘Diary of an Obscure German Artist with (Almost) No Friends’. See also the digital collections at the Royal Library of the Netherlands https://www.kb.nl/themas/vriendenboeken and Leiden University Library, Collection guide Alba amicorum Collection (ubl290).