This paper presents the steps taken to integrate data from the UD_Latin-PROIEL treebank into the LiLa Knowledge Base of interoperable linguistic resources for Latin.It describes how the lexical, morphological, syntactic, and citation information from the source was modeled using the Linked Open Data principles as adopted by the LiLa Knowledge Base.The process of linking tokens to the LiLa collection of Latin lemmas is detailed, addressing challenges such as ambiguities, new lemmas, and errors encountered in the source.The outcome is a syntactically annotated textual resource that is interoperable with the (meta)data of other Latin linguistic resources linked within the LiLa Knowledge Base.This integration enables new ways of analyzing linguistic information and using the content as a starting point to explore connections with other interlinked resources.A use case demonstrates this interoperability.