Integrating archival information from different cultural heritage institutions to support historical research has been a commonly pursued goal among humanities digital research infrastructures. Due to the lack of standards in performing such processes, there is a need to provide guidance to interested parties and share knowledge deriving from successful practices. In this chapter, we introduce the Historical Information Curation (HIC) model that aims to address this need. Based on our experience with aggregating and curating archival collections, we have developed a two-faceted model for such processes, capable of supporting both the structural representation of the required workflows and the analysis of their dynamics.