According to media reports the couple will get married in Brussels on September 10th 2022.
It was confirmed today at a press conference given by the Mayor of Brussels and the spokesperson for the couple.
A summary from Nieuwsblad's royal correspondent Wim Dehandschutter (first shared by Stefan in the engagement thread):
"[CONFIRMED DATE] Belgian Princess Maria Laura will marry William Isvy on September 10, Brussels mayor @PhilippeClose and couple’s spokesman @HerveVerhoosel said in a press conference.
? Civil marriage at Brussels town hall in the morning.
? Private ceremony, only +/- 35 guests.
? Witnesses: Laura’s sisters Luisa and Laetitia; William’s brother and sister.
? Religious marriage at St Michael and St Gudula Cathedral, Brussels (2:30PM).
? 500 guests, including Belgian royal family.
? Catholic celebration with Jewish influences (William is Jewish)."
Media reports have further details from the press conference. (There are minor differences in the quotes given in various media outlets.)
The civil wedding guests will be welcomed to City Hall by around two dozen police cadets. According to the spokesperson, "the couple plan on organizing the civil ceremony in an intimate circle. Only a small number of family members will be present."
The religious wedding will be officiated by the archbishop of Mechelen-Brussels. Per the spokesperson, "five hundred Belgian and foreign guests will be invited to the religious service, including all the members of the royal family". "The couple want songs to play an important role. Both Christian and Jewish songs will be performed."
Following the ceremonies, the parents of the couple will host private receptions in Brussels. "In addition to the parents, the sisters and brothers of the bridal couple and some good friends are assisting with organizing the celebration and receiving the guests."
Regarding the couple's choice of a Brussels wedding even though they live and work in London:
The spokesperson stated: "Even though they live in London, it is important to them to marry here in Belgium. The couple want to strengthen their connection to Brussels in this way. It is a symbolic choice. It's the perfect opportunity for Laura to show off the city of Brussels and our beautiful country to her in-laws, and also because Laura's parents, Princess Astrid and Prince Lorenz, were married here at the city hall on 22 September 1984."
The mayor added: "All Belgians also remember the marriage of Philippe and Mathilde at the city hall. When a member of the royal family marries here, it's always moving. It is going to be a joyous moment and a beautiful look for Brussels."
https://www.lesoir.be/460351/articl...laura-de-belgique-epousera-william-isvy-le-10
https://www.standaard.be/cnt/dmf20220811_97563031
https://www.hln.be/royalty/prinses-...-intieme-kring-georganiseerd-worden~a67e7151/
Princess Astrid and later her two brothers also held their civil weddings at the City Hall of Brussels.
Previous religious weddings of the Royal Family at the St Michael and St Gudula Cathedral (Brussels Cathedral) include Prince Leopold and Princess Astrid (1926), Prince Albert and Princess Paola (1959), King Baudouin and Queen Fabiola (1960), Prince Philippe and Princess Mathilde (1999), and Prince Laurent and Princess Claire (2003).
Note that the wedding of Princess Astrid and Prince Lorenz did not take place there, as the cathedral was in the process of restoration from 1983 to 1999.
https://www.cathedralisbruxellensis.be/en/history/
Were past royal religious weddings likewise officiated by the archbishop of Brussels?