Otakar Sedloň was born on 30 August 1885 in Trpín in eastern Bohemia, formerly part of Austria-Hungary.

In the mid-1920s, he traveled quite a bit, visiting places like the coast along the Adriatic Sea, Paris, Carpathian Ruthenia and Romania.

During this time, Otakar had his studio on the prestigious Narodni trida in Prague and was known as an excellent portrait painter.

His paintings were displayed in the offices of ministries, banks and held by private collectors.

Otakar Sedloň died on 18 October 1973 and was buried in the family tomb in Vamberk, together with his mother and father.