After four centuries, its rusted doors have finally opened.

The Mysterium Fidei Museum is an immersive experience that will take you to a world within a world; into the underground complex lying beneath St. Catherine’s Monastery in Valletta. Monastic nuns who chose to lock themselves from the outside world, till death and beyond it. Immerse yourself into everyday life at the monastery and the fascinating secrets hidden within these walls. Travel through time from the era of the Knights of St. John, to this day. Take an audio tour of the complex, and stand in rooms used for work, prayer, restraint, and the sleep of death. We invite you to come and witness. This is truly a mystery of faith!

The Audio Tour is available in eight languages:

🇬🇧 🇲🇹 🇫🇷 🇪🇸
🇩🇪 🇮🇹 🇵🇱 🇷🇺

Tickets are also available to purchase from the reception desk at the Monastery.

About Us.

Hidden Valletta Ltd. is a venture that brings together a team that is active in the fields of tourism, culture, event organisation and hospitality. What’s more, the management team were born and bred in Valletta – St. Catherine’s monastery was as fascinating to them , as it was part of their lives. When you visit, you will experience a labour of love: a strong commitment to share a legacy that is now being opened up to you who are willing to witness it.

The Experience


01. St. Catherine’s Monastery

St. Catherine’s Monastery was founded in 1575, initially to care for female orphans. It was built as solemn thanks for prayers answered, with the stonework used to build this monastery, literally dug from underneath it. The open quarry was then turned into the underground complex you will be experiencing. Over hundreds of years, cloistered nuns made an oath to lead a life of prayer, contemplation, and of service. From within the walls of this monastery, what is probably the last generation of nuns carry on the legacy to this day.

02. The Underground Complex.

Originally used as a quarry to build the monastery above it, the underground complex is packed with stories that transcend centuries. From the ribbed vaulted rooms, the peaceful, central garden, the fiery ovens, and the undisturbed burial place, this complex is as fascinating as it is unique. From the hustle and bustle of Valletta’s sights and sounds, this silent, underground complex is an oasis of peace and tranquillity. Its spaces whisper tales of hard work, intense prayer, and care for all those who needed help. As part of your visit to Valletta, Mysterium Fidei is an authentic experience that cannot be missed.

Tickets are also available to purchase from the reception desk at the Monastery.

Opening Hours.

Monday 09:30 – 16:30 (Last entry: 16:00)
Tuesday 09:30 – 16:30 (Last entry: 16:00)
Wednesday 09:30 – 16:30 (Last entry: 16:00)
Thursday 09:30 – 16:30 (Last entry: 16:00)
Friday 09:30 – 16:30 (Last entry: 16:00)
Saturday 09:30 – 16:30 (Last entry: 16:00)
Sunday 09:30 – 16:00 (Last entry: 15:30)
Public Holidays 09:30 – 16:00 (Last entry: 15:30)

Tickets are also available to purchase from the reception desk at the Monastery.

How to get there

Located only three minutes away on foot from the Grandmaster’s Palace, Mysterium Fidei Monastery secretly lies in the paved part of St. Christopher Street between Republic Street and Strait Street.

Buy Tickets & Download App

Beat the queue and lessen your waiting time. You can buy tickets to Mysterium Fidei Museum online by clicking the link below. Tickets are also available to purchase from the reception desk at the Monastery.

The audio tour is accessed via the Mysterium Fidei App on your mobile phone. You can download the free Mysterium Fidei App from here. This will save you time when you arrive at the Museum as you will be set up and ready to follow the simple instructions and listen to the narration through your smartphone’s earpiece in your language. You could then use the app’s inbuilt code reader to move from one location to another.

Ticket Prices

Adults: €8
Kids under 12: €4
Kids under 5: Free

Tickets are also available to purchase from the reception desk at the Monastery.



Need to ask us anything? Want to organise a group booking? Contact us during office hours on:
+356 7746 7061 or +356 7708 3138
Alternatively, send us an email on [email protected] or contact us using the form below: