After his older brother Sigmund Franz on 26 August 1667 left him as the new Hereditary Prince (Erbprinz), Leopold Ignaz Joseph had an aristocratic and chivalrous upbringing, during which he resided some time in Paris, where he acquired the pomp and extravagant attitude after whom he was remembered in later generations.
After returning to the Imperial court, Leopold Ignaz Joseph was named Privy Councillor. Due to the high position and authority of his father, Prince Ferdinand Joseph, at court, he had great hopes and expectations for his future. However, these hopes were not fulfilled. Historian Rostislav Smíšek refers to some rumours about the young prince that circulated at court,[1] which in 1685 completely stopped the progress of Leopold Ignaz Joseph in the political hierarchy. Prince Ferdinand Joseph managed to protect his son, but his career was halted for a long time: for many years, he only had the functions of Kämmerer and Privy Councillor.
In 1698, shortly after he assumed the title of Prince of Dietrichstein following his father's death, Leopold Ignaz Joseph was named Knight of the Order of the Golden Fleece as the Knight 591 since his foundation. His first high appointment took place only in 1705, when he was named a member of the Imperial Chamber. His renewed career was stopped by his early death in 1708 at the age of 48, from tuberculosis.[1]
