In 1993, Maria-Anna and her family moved to Moscow. While there, she served on the board of a children's school, organized an annual charity dinner for local medical institutions for children in need, and worked on repairing churches in Russian villages.[citation needed]
Maria-Anna has played an active role in the campaign for sainthood of her grandparents. Her grandfather, Charles I, was Beatified by Pope John Paul II in 2004, and is known in the Catholic Church as Blessed Karl of Austria.[7] Her grandmother, Zita, was named a Servant of God in 2009.[8]
After moving to Chicago in 2008, Maria-Anna became a parishioner at St. John Cantius Church.[9] Father Frank Phillips, the pastor of St. John Cantius Church, built a shrine in honor of Maria-Anna's family in the church's Chapel of Dormition. The shrine is dedicated to her grandparents and an ancestor of her husband, Prince Demetrius Augustine Gallitzin, who is also venerated in the Catholic faith.[9] She was a guest at a formal banquet hosted by the Canons Regular of St. John Cantius at the University Club of Chicago, and promoted the religious community's efforts to maintain traditional liturgical forms.[10]
In July 2011, she served on the VIP Host Committee of the Moscow Demographic Summit, an event sponsored by the World Congress of Families focusing on promoting traditional marriage, increasing birthrates, ending abortion, ending the death penalty, and advocating for family rights around the world.[11]
In October 2018, Maria-Anna was a guest of honor at a three-day symposium held in Dallas, hosted by the Emperor Karl League of Prayer and the Priestly Fraternity of Saint Peter, in honor of her grandfather's feast day.[15][16][17] The symposium, attended by over five-hundred people, was held in order to bring awareness to the cause for sainthood of Charles I.[16] Maria-Anna gave talks about her family at the public library in Allen and at Mater Dei Catholic Church as part of the symposium.[16][17] The symposium concluded with a Solemn Mass including the veneration and blessing of a first-class relic of Charles I.[16] Maria-Anna remains an active member and leader in the Blessed Karl League of Prayer.[5] In 2019, she gave an interview during the Symposium on Blessed Karl von Habsburg, The Last Emperor & King of Austria-Hungary.[18]
Prince Dimitri Petrovich Galitzine (b. 11 June 1990)
Prince Ioann Teimouraz Petrovich Galitzine (b. 27 May 1992)
Exiled from Austria in the earlier years of their marriage, due to the Habsburg Law, Maria-Anna and her family lived in Belgium, Luxembourg, Russia, and the United States.[9]
On 16 July 2011, the family attended the funeral and burial of Maria-Anna's uncle and the last crown prince of Austria, Otto von Habsburg, in Vienna.[1]
Her daughter, Princess Maria, died in 2020.[22][23]
Generations are numbered by male-line descent from Frederick III, Holy Roman Emperor. Later generations are included although Austrian titles of nobility were abolished and outlawed in 1919.