Alexandrine, married on 9 December 1865 to Wilhelm of Mecklenburg-Schwerin.
In 1845 she left her unfaithful husband and began to live with her lover and former coachman. On 28 March 1849, Marianne and Albert of Prussia were formally divorced. Seven months later in Cefalù, Sicily, she gave birth to her only child with van Rossum, a son, called. After this, the courts of The Hague and Berlin broke all contact with her. Marianne, Johannes and their son spent the following years in Italy and from 1853 at Weißwasser Castle near Jauernig.
Philanthropy
In 1855 Marianne bought in Erbach, Rheingau. An unusually progressive woman and cultural visionary, she made the Schloss Reinhartshausen a cultural center of the Rhine. Marianne reconstructed part of the Schloss as a museum to house her collection of 600 paintings. The museum is known today as the Festsäle. The Schloss was always vibrant with many guests and Marianne encouraged young artists providing them accommodation. Of her treasures, 180 paintings, 110 drawings including watercolors and gouaches, as well as various sculptures can be found there today. On Christmas Day of 1861, her son Johannes Wilhelm died of pneumonia in Reinhartshausen at age twelve. To honor him, Marianne donated 60.000 Gulden to the Erbacher locals for a piece of land on which a church was to be constructed. The church was completed and Johannes buried under its altar. The church, named after Johannes, is today’s Protestant church in Erbach. In 1872 in the name of her father King Willem I, she donated 18,000 to Dillenburg to help finance the creation of a new lookout tower, Wilhelmsturm, to commemorate her ancestor William the Silent who plotted his rebellion against the Spanish Netherlands from his home on this spot. On 10 May 1873, Johannes van Rossum, Marianne's partner for almost thirty years and the love of her life, died aged sixty-four. He was buried next to his son. Marianne survived him by ten years and died in the Schloss Reinhartshausen in Erbach twenty days after her seventy-third birthday. She was buried near Johannes van Rossum and their son. Her eldest son, Prince Albert of Prussia, inherited her estate, included the Schloss Reinhartshausen. In 1940, her grandson, Prince Frederick Heinrich of Prussia -Albert's son- owned the property. Today the Schloss Reinhartshausen is a 5-star hotel.
