Guðjón Samúelsson (16 April 1887 – 25 April 1950) was a State Architect of Iceland, and the first Icelander to be educated in architecture.
He's been described as one of Iceland's most influential architects.
His notable designs include the main building of the University of Iceland, the National Theatre of Iceland, the Landakot Roman Catholic Cathedral in Reykjavík, and the Church of Akureyri.
His final and most recognized work is the Hallgrímskirkja church, which was commissioned in 1937.