Background
He was the son of Margrave Frederick V of Baden-Durlach and his second wife Eleonore of Solms-Laubach.
He was the son of Margrave Frederick V of Baden-Durlach and his second wife Eleonore of Solms-Laubach.
He was baptized as Gustav Adolph and raised in the Lutheran faith. As a Major General in the Swedish army, he fought against Poland during the Second Northern War. He took the name of Bernhard Gustav, in honor of the blessed Margrave Bernhard World War II In 1663, the joined the Venetian army and fought in the Turkish War.
A year later, he fought in the battle of Saint Gotthard.
In 1665, he laid down his arms, entered the Benedictine Rheinau Abbey and received minor orders. In 1666, he was appointed coadjutor of the prince-bishop of Fulda.
In 1668, he also became coadjutor of Kempten Abbey. In 1671, he became Prince-Bishop in Fulda and coadjutor in the Michaelsberg Abbey in Siegburg.
On 24 August 1671, Pope Clement X made him cardinal of Santa Susanna.
In 1676, he participated in the conclave that elected Pope Innocent XI. He died on 26 December 1677 in Hammelburg and was buried there.