This issue of postage stamp commemorates the 1150th anniversary of the recognition of the Slavic liturgical language and the events preceding it. After forty months of missionary work in Great Moravia, Saints Cyril and Methodius set off on a journey across Pannonia to Venice, which was a part of the Byzantine Empire, and Constantinople with disciples who they sought to have ordained by a bishop, since they were not bishops themselves yet. In Venice, they were invited to Rome by Pope Nicolas I who then died soon after. His successor, Pope Adrian II received the brothers in a warm and dignified...