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Mysterium Fidei Museum (St. Catherine's Monastery and Secret Garden)
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Mysterium Fidei Museum (St. Catherine's Monastery and Secret Garden)

4.6(5 reviews)
20 minute(s)
English (United Kingdom)
Valletta, Malta

Free cancellation

Up to 24 hours

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No hidden fees

Visit rooms used for work prayer and reflection

See peaceful central garden fiery ovens and burial site

Learn history from Knights of St John to present

Self guided audio tour available in eight languages

Unlocking Centuries of Silence Beneath the Historic St. Catherine Monastery in Valletta Malta Today


After four long centuries of isolation, the rusted doors of the underground complex beneath St. Catherine’s Monastery have finally been opened to the public. This immersive museum experience transports visitors into a hidden world once occupied by cloistered nuns who dedicated their lives to prayer and contemplation. By exploring these subterranean chambers, guests gain a rare glimpse into the authentic daily existence of a religious order that remained separated from the external world until their final days.


The monastery itself was founded in 1575 as a charitable institution for female orphans, constructed using stone excavated directly from the site. This original quarry was subsequently transformed into the intricate underground network that visitors explore today. As you walk through the rooms once used for work, prayer, and eternal rest, you will uncover the fascinating architectural and spiritual history that has been preserved beneath the bustling streets of Valletta for hundreds of years.


Travelers are invited to take an audio-guided tour that chronicles the evolution of the site from the era of the Knights of St. John to the present day. The narrative highlights the profound commitment of the nuns who lived within these walls, maintaining a simple life of service and silence. This unique journey offers a poignant look at the intersection of faith, history, and the human desire for spiritual seclusion in a changing world.


Witnessing this mystery of faith provides a profound connection to Malta’s religious heritage and the hidden stories of its capital city. The museum serves as a bridge between the past and the present, allowing guests to reflect on the lives of those who chose to isolate themselves from society. It is an essential visit for anyone interested in the deeper, often overlooked cultural layers that define the historical landscape of Valletta and its enduring monastic traditions.

What's Included
  • Entry ticket to museum
  • Self guided audio tour
  • Free Wi-Fi
What's Not Included
  • Hotel pick-up and drop-off
  • Live tour guide
  • Food and drinks
  • Gratuities
Price start from

$ 8.95

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Activity Provider: Robert Arrigo & Sons

Customer Reviews

4.6
Excellent
Based on 5 reviews
I
Irina G.Google
December 30, 2025

Very small small please. It is nice but with money you collect please take care of the cats you have. One of them is very sick. He has a cough. And both of them have a fleas because they are very itchy.

G
GDT Google
December 09, 2025

My second visit to one of the most beautiful (and peaceful) places in Valletta. The attraction is one of two run by Hidden Valletta and with their attention to detail I hope we'll see more from them in the coming years. The site allows a historic insight into the lives of the Augustinian Cloister Nuns and takes you through what their daily life would have been like. The Secret Garden in the centre of the attraction is an oasis of peace and tranquility. Highly recommended and very affordable!! The student on the door (studying history at Valletta university) was an excellent ambassador for the attraction too!

D
Dani H.Google
November 11, 2025

It was a nice way to spend 20 minutes, a little expensive for what you get and I probably expected more from the secret garden, which was really just a small garden in a courtyard. Pretty place and there was a basket of kittens, so frankly that was worth the entry fee for me. Not entirely sure I'd recommend paying to visit, I am from Scotland where entry to churches and museums are free so that may sway my opinion a little, thought it was a pleasant experience.