Near the Prague Castle is Our Lady of Loreto, also spelled Loreta. It is worth visiting. You will hear the thirty bells ringing from the belfry – they chime hourly – long before you reach the Church of the Nativity. This site is a Marian pilgrimage maintained by Capuchin monks. Inside is a replica of Santa Casa, the house where the Virgin Mary experienced the Annunciation when Archangel Gabriel proclaimed she was pregnant with the Son of God. Loreto Prague also has an extensive collection of sacred art and treasures. The most impressive is the Prague Sun, a monstrance used to display the Eucharist covered with 6,222 diamonds.