Collegiate Basilica of the Annunciation of the Blessed Virgin Mary in Pułtusk is the second temple in the hierarchy in the Diocese of Płock. A vault decorated with polychrome was discovered inside, thanks to which a new term called "Pułtusk vault" was created in the history of art. In addition, inside you can admire many antique objects, including goblets, valuable paintings or reliquary.
The oldest goldsmiths located in the basilica are a turret monstrance, reliquary of the Holy Cross dated 1450 and chalices from the 15th century. A particularly valuable work of art is the sixteenth-century painting "Mourning", which was painted on the basis of Michelangelo's Pieta.
The main altar of the basilica was built in the eighteenth century and is decorated with a painting of the Annunciation of the Blessed Virgin Mary. The temple also has a conciliar altar and fourteen side altars, in which paintings from the seventeenth and eighteenth centuries were placed. The nineteenth-century organs located here are also a valuable monument.