Burckhardtsource.org is a semantic digital library created within the ERC project “The European correspondence to Jacob Burckhardt” coordinated by Prof. Maurizio Ghelardi (Scuola Normale Superiore, Pisa). The time span 1842–1897 witnesses a period of significant cultural transformations. Texts also offer content-related information. Indeed, a semantic annotation tool enables users to create semantically structured data. The combined use of the semantic annotator Pundit and the customised vocabulary Korbo offers an effective tool for data retrieval, representing different data – such as metadata and annotations – in several ways, according to the way users want to put them in relation.