In the early 20th century, concrete became a popular construction material in Reykjavík. One of the earliest examples is at Austurstræti 16. Apotekið (The Pharmacy) was designed by Guðjón Samúelsson in 1930 with this whimsical ornamentation resembling a Viking. Samúelsson became the country’s most prolific and famous designer. As the State Architect, he was also responsible for the city’s urban planning. His signature work is Hallgrimskirkja Church, a masterful project that was not finished until 36 years after his death.