Filming on Netflix’s adaptation of Dan Brown‘s The Secret of Secrets will close Prague’s Mariánské náměstí on Wednesday and Thursday, Nov. 4–5, as production continues on the new Robert Langdon series starring Morgan Spector and Rebecca Hall.
According to a notice published by the Prague Municipal Library, the entire square will be inaccessible during the two-day shoot, including the library’s main entrance. Visitors can still access the Central Library through its side entrance on Valentinská Street, beneath the sculpture by Vlado Milunić.
The library’s popular Idiom book installation, along with its bistro and workshop, will be temporarily inaccessible. The closure marks the latest disruption caused by one of Prague’s highest-profile international productions of 2026, which has been filming extensively across the Czech capital since early September.
‘The Secret of Secrets’ takes over Prague landmarks
As previously reported by The Prague Reporter, production began with shoots around Prague’s historic center, including Josefov, Jan Palach Square near the Rudolfinum, and Čechův most.
One of the most substantial early shoots took place at the Art Nouveau Municipal House (Obecní dům) on Sept. 2, when both the building’s restaurant and café were closed for filming. Firefighters and extensive production equipment were visible outside, suggesting an elaborate sequence was being filmed inside.
Netflix subsequently released its first official image from the production, showing Spector and Hall together outside Municipal House, confirming the location’s appearance in the series.
More recently, filming has moved to Prague’s Letná neighborhood, with shoots taking place near Letenský zámeček, the Expo 58 pavilion and nearby water features. Production also took place on Charles Bridge in October.
Brown himself recently visited Prague to observe filming, attending both daytime and nighttime shoots. Going by social media updates from the Czech capital, the author appears to be pleased with the progress of the adaptation.
Further location filming is planned for Petřín, where the newly reopened funicular will be closed to passengers from Nov. 10–13. Prague’s public transport operator has confirmed that the funicular, Petřín Lookout Tower, Prague trams and the metro will all appear in the production.
Morgan Spector brings Robert Langdon to Prague
Unlike many international productions that use Prague to double for other European cities, The Secret of Secrets is explicitly set in the Czech capital, with locations central to Brown’s original story.
Published in September 2025, the novel follows Harvard symbologist Robert Langdon as he travels to Prague with Katherine Solomon, a scientist whose research into human consciousness could have profound implications. When Solomon disappears following a violent incident, Langdon becomes entangled in a mystery that takes him through Prague’s historic landmarks and eventually beyond the Czech Republic.
The book features numerous recognizable Prague locations, including Charles Bridge, the Klementinum, Petřín Lookout Tower and its mirror maze, and the former Jewish Quarter of Josefov. Mariánské náměstí itself also appears in the novel.
Spector, best known for HBO’s The Gilded Age, takes over the role of Langdon from Tom Hanks, who portrayed the character in three feature films directed by Ron Howard: The Da Vinci Code, Angels & Demons and Inferno. Ashley Zukerman previously played a younger Langdon in the television adaptation of The Lost Symbol.
Hall, Spector’s real-life wife, stars opposite him as Solomon. The supporting cast includes Cherry Jones, Corey Stoll, Rob Delaney, Abbey Lee, Mamoudou Athie and Anamaria Marinca.
The Netflix series was developed by Brown and Carlton Cuse, known for Lost, Bates Motel and Tom Clancy’s Jack Ryan. Cuse serves as showrunner and writer, with the adaptation expected to run approximately eight hours.
The production represents a particularly significant opportunity for Prague’s film industry, placing the city itself at the center of a globally recognized franchise rather than using its architecture as a substitute for another location.
Filming is expected to continue through the coming weeks. Netflix has not yet announced a premiere date for the series.
