Sigurd Frosterus

Sigurd Frosterus (4 June 1876 – 2 March 1956) was a Finnish architect, art critic, and art collector.

Born in Asikkala, Frosterus graduated from Helsinki University with a degree in art history in 1899, and earned a diploma of architecture in 1902 at Polytechnical Institute. In 1920, he earned his doctorate at the University with a dissertation on the use of colour in art.

Frosterus had an architectural office from 1902–1904 with Gustaf Strengell and from 1918–1935 with Ole Gripenberg.

Frosterus was the editor of Arkkitehti magazine from 1908–1911, and published books on art theory. He was also a talented watercolour painter. Moderna vapen, deras uppkomst och utveckling (1915) Olikartade skönhetsvärden (1915) Regnbågsfärgernas segertåg (1917) Solljus och slagskugga: 1 (1917) Färgproblemet i måleriet: 1 (1920) Jorden krymper, jorden växer (1930) Ab Stockmann Oy (1931) Stålålderns janusansikte och andra essäer (1935) Nordiskt i dur och moll (1946) Arkitektur (1904)