It measures 2.50 m. 2.25 diameter by height in the vessel. It has a weight of 10060 kg (according to other data can weigh between 11,606 and 13,000 kg). It is located on the north side tower of the Cathedral Pamplona. It is used in the most solemn celebrations in touch dead, singular thing, since that stupendous bells are assigned to touch size schedule. Is the best known, the most corpulent and loudest of all the bells of the cathedral. Recently been restored all the bells of the cathedral, although this, by its enormous size has not been able to lose its original location. When they built the tower, Mary Bell was already risen to its proper place, so it is not possible to take the bell down without removing the tower itself that hosts it. There is a popular saying in our city that refers to the famous Bell Mary. Apparently its grave sound reaches many miles away (about 14 km), so that they say that the “Pamplona Basin” extends as far as the sound of Mary Bellis heard. Compared to the rest of bells Spain, ranked second in weight and size, surpassed only by a bell of Toledo (17,000 kg.). However, is the largest bell in using Spain as the Toledo hood is cracked. The date of his cast was on September 15, 1584 by Pedro de Villanueva.