Hjalmar Kjær was a Danish architect who worked extensively in Odense and made notable contributions to architecture in Denmark in the 19th and 20th centuries.

He attended a technical college before he was admitted to the preparatory course of the Royal Danish Academy of Fine Arts in 1894 and graduated as an architect in May 1896.

[2][3] In Aarhus he also built the Five Sisters silo complex which was the largest in the Nordic countries at the time and the first structure in the city made of reinforced concrete.

The building is notable for the five front gabled silos inspired by canal houses in Amsterdam and other Dutch cities combined with a modern and high-tech engineering solution to industrial needs.

[clarification needed] The silos have smooth, white facades absent any decoration in the functionalist style prevalent at the time and is today an Industrial Heritage Site.