ENThis article offers a first study of the traffic of corpisanti catacomb relic-sculptures between Rome and sites in the Grand Duchy of Lithuania and Polish Livonia in the decades just before and during the Age of Partition (c. 1750-1800). The article firstly frames an overview of current knowledge on corpisanti more broadly against cases in Livonia and the Grand Duchy. It secondly provides a clearinghouse of secondary and primary source evidence on this topic, with particular attention to providing previously largely unpublished or understudied texts pertaining to corpisanti cults in the north in translation, included as appendices. This article also presents a study in methods of collaborative scholarship in the pandemic era, investigating across distinct genres of source materials and material and artistic cultural heritage objects accessed via scholarly networks both in the field and online, representing historic sites and institutions in present-day Italy, Ukraine, Belarus, Poland, Latvia, and Lithuania. Keywords history of art, relics, history of religion, Baltic history, Counter-Reformation, Rome. [From the publication]