The Zinn House was in the 1900s purchased by Alfred Olsen & Co., an oil company founded by Alfred and Ottho Olsen, in 1901, which had until then been based at Nyhavn 51.. Otto Olsen died in 1906.
The company prospered during]]World War I]].
Alfred Olsen commissioned the young architect Terkel Jhejle to refurbish the building in 1915.
He purchased the estate Egebæksvang at Nærum in 1916 and commissioned Hjejle to expand the main building with a new wing.
Olsen's wife, Olufa Olsen, née Bøjesen, died in 1917.

The company's name was changed to the Danish-American Gulf Oil Company in 1946.
The Zinn House was in the 1900s purchased by Alfred Olsen & Co., an oil company founded by Alfred and Ottho Olsen, in 1901, which had until then been based at Nyhavn 51.. Otto Olsen died in 1906. The company prospered during]]World War I]]. Alfred Olsen commissioned the young architect Terkel Jhejle to refurbish the building in 1915. He purchased the estate Egebæksvang at Nærum in 1916 and commissioned Hjejle to expand the main building with a new wing. Olsen's wife, Olufa Olsen, née Bøjesen, died in 1917.
The company's name was changed to the Danish-American Gulf Oil Company in 1946.
Zinn House