This presentation introduces the Proyecto Humboldt Digital (ProHD), a cooperation project between the Academy of Sciences and Humanities of Berlin-Brandenburg (BBAW, Germany) and the Casa Humboldt of the Office of the Historian of the City of La Havana (OHCH, Cuba). ProHD aims to preserve and provide online access to documents that witness the “traces” of Alexander von Humboldt and Cuban intellectuals and politicians, such as Francisco Arango y Parreño, and the conditions in which the slave trade took place. The presentation covers the following aspects of the project: its objectives and duration, the cooperation with other institutions, the digital workflow, and the most important challenges and benefits.