Reykjavík is home to Icelandic medieval literature, including the Sagas of the Icelanders and the Poetic Edda, landmarks of world literature still widely read and translated today. This literary heritage is the core of the nation's identity and narrative art is the single most important part of its cultural history. The Árni Magnússon Institute for Icelandic Studies in Reykjavík is the centre of this heritage. It preserves manuscripts, conducts research on them and publishes texts for the public, in addition to offering research facilities and tutoring to foreign scholars and students. The Arnamagnean Manuscript Collection was added to the UNESCO Memory of the World Register on 31 July 2009. Reykjavík city was designated as a UNESCO City of Literature in 2011 and joined then the  UNESCO Creatives Cities network.