«Il libro del Cristiano»: indagini sul Laur. Plut. 9.28, testimonio della Topografia cristiana di Cosma Indicopleuste

The secondary literature on ms. Laur. Plut. 9.28 is vast, as testified by the online bibliography. Nevertheless, the only complete description of the codex is the eighteenth-century one by Angelo Maria Bandini; Wanda Wolska Conus’ description, in her critical edition, is not been founded on a direct examination of the manuscript. Scholarly attention has always concentrated almost exclusively on the decoration of the manuscript, which has never been studied from a palaeographical and codicological point of view. This paper aims to reconsider Cosmas’ codex Laurentianus from this perspective. It contains a reconstruction of the codicological structure of the manuscript and an elucidation of the incorrect page binding and of its consequences from the sixteenth century to 1963; an analysis of the handwriting, which may be dated to the end of the eleventh or the beginning of the twelfth century; an edition of the text and an interpretation of the scholia by later hands which occur in the manuscript.