[1] Aage Langeland-Mathiesen completed a carpenter's apprenticeship and studied at Copenhagen Technical College before enrolling at the Royal Danish Academy of Fine Arts in 1884.

In 1897, he won the Neuhausen Prize for a model of Copenhagen's third city hall and received the academy's travel grant.

[2] He worked for Valdemar Koch from 1894 to 1898 on the measurement of Danish medieval churches and was later associated with the National Museum for fifteen years.

[2] The work he created in collaboration with Ulrik Plesner are characterized by a more consistent style influenced by the Bedre Byggeskik movement, Baroque and Romantic Nationalism.

He was vice president of the Danish Motor Vehicle Owners' Association (FDM) and chairman of the Glacisgaarden Motorcycle Club.