On 21 June 1893 in Fischhorn Castle, Zell am See, Guillaume married Infanta Maria Ana of Portugal, daughter of the deposed king Miguel I of Portugal and Adelaide of Löwenstein-Wertheim-Rosenberg.
Are there photos of this wedding?
Some time during the early 1880's, Prince Wilhelm had been introduced to Infanta Maria-Ana of Portugal, daughter of the deposed king Miguel I of Portugal and his consort Princess Adelaide of Löwenstein-Wertheim-Rosenberg. It is believed that they couple first met at Schloss Tegernsee in Bavaria through Duke Karl-Theodor in Bavaria, brother of Empress Elisabeth of Austria, who was married to Infanta Maria-José of Portugal, an older sister of Infanta Maria-Ana.
On 21 June 1893, Prince Wilhelm and Infanta Maria-Ana were finally allowed to marry after Duke Adolph gave his consent and Pope Leo XIII granted the necessary dispensation for a Catholic to marry a Protestant. The couple tied the knot at Schloss Fischhorn near Zell am See in Austria, at the time owned by the Princely Family of Liechtenstein. They were married by the Prince-Archbishop of Salzburg and afterwards were blessed by a Lutheran priest.