Also, Agnes had influential connections through her previous marriage to Frederick of Hohenstaufen,[2] one of her sons being Conrad III of Germany.

[2] According to legend, the Virgin Mary appeared to him and led him to a place where he found the veil of his wife Agnes, who had lost it years earlier.

Leopold also founded the monasteries of Heiligenkreuz, Kleinmariazell and Seitenstetten which developed a territory still largely covered by forest.

The writings of Henry of Melk and Ava of Göttweig, which are the first literary texts from Austria, date back to Leopold's time.

In 1663, under the rule of his namesake Emperor Leopold I, he was declared patron saint of Austria instead of Coloman of Stockerau.

By his second wife, Agnes of Germany, widow of Frederick I, Duke of Swabia: According to the Continuation of the Chronicles of Klosterneuburg, there may have been up to seven others (possibly from multiple births) stillborn or who died in infancy.

In 2013, documentation regarding the results of DNA testing of the remains of the family buried in Klosterneuburg & Heiligenkreuz strongly favor that Adalbert was the son of Leopold and Agnes.