This paper briefly presents the origins, mission and main tasks of Apollonis, the Greek Research Infrastructure for the Arts and Humanities and Language Technology and Innovation. It focuses, in particular, on one of its two components, DARIAH-GR/DYAS. DARIAH-GR/DYAS was created in 2009 as the national branch of the European Research Infrastructure for the Arts and Humanities, DARIAH EU, and it is currently a network of six academic and research institutions, technology experts and content owners. The main aim of DARIAH-GR/DYAS is to enhance and support digitally-enabled research and teaching across the arts and humanities in Greece. The paper concentrates on those of its research principles and activities that are of particular interest to historians, a wide range of activities including digital services, training and education, dissemination and national and international networking. Finally, it lays out the infrastructure’s aims for the next phase of its operation.