|Christen Ustrup Thiesen|
|Born|| November 24, 1856|
|Spouse||Emilie Lehnkuhl (née Lupkes)|
|Children||Rudolph John, Petrea Elizabeth, John Henry, Olga, Bernhardine ("Dina")|
Christen Ustrup Thiesen (first name sometimes given as Christian) was a Pensacolian businessman best remembered for his ownership of the Thiesen Building.
Christen Thiesen's career as a Pensacola businessman began through unusual circumstances. Born in Denmark, Thiesen was the navigator of a Danish sailing ship. Thiesen became stranded in Pensacola during the Pensacola yellow fever epidemic of 1882 when his ship left without him. According to a story passed down in the Thiesen family from generation to generation, his crewmates, hearing of the epidemic, refused to let him back on board. (At that time it was not generally known that yellow fever is not transmitted by person-to-person contact, but by mosquitoes.)
Thiesen, who contracted yellow fever but recovered, found a job tending bar in a saloon. The saloon owner died in the epidemic. In 1884, Thiesen married the saloon owner's widow, Emilie Lehnkuhl, and thus became the owner of the saloon, located at the southwest corner of Intendencia and Baylen Streets..
Christen and Emilie had four children who lived to adulthood; Thiesen also adopted his stepdaughter Dina. Emilie died in January, 1900 due to complications of childbirth. In April, 1901, Thiesen married Effie Lee Mitchell. Thiesen was granted U.S. citizenship in 1902.
He built the Thiesen Building on the northeast corner of Palafox and Romana Streets in 1901. He was reportedly warned that his venture would fail and the building would be lost to receivership. Thiesen responded by vowing to fly the Danish flag from the building each April 1st as a symbol of his continued ownership. It is said that Thiesen raised the Danish flag every April 1st until his death.