Medieval memoria - commemoration of the dead - was both a form of collective memory and a social practice that was present in every sphere of life. It shaped identities and constituted groups, thus the research of commemorative practices can tell lots about medieval communities. This study reveals importance of memoria as a form collective memory for different groups and institutions: urban government and guilds, the Teutonic Order, bishops and cathedral chapters, and monastic communities, in late medieval Livonia (modern day Latvia and Estonia). Livonia was Christianised during the thirteenth century and rapidly woven in the fabric of medieval European culture and the historiographical narratives of this period represented collective memory of multiple Livonian communities.