For more than 800 years they have adorned Gniezno Cathedral, which is the most important religious monument in the city. Gniezno is a city in the Greater Poland province to which Poles feel a special fondness, as it was the country's first capital. For almost 300 years, Gniezno Cathedral was the church where the coronation of kings took place. The Gniezno Doors are one of the oldest works of Polish bronze casting. The wings of the Gniezno Gate are huge. Each of them is more than 3 meters high and over 80 cm wide. The thickness of the wings varies between 1.5 and 2.5 cm. It is a unique monument that shows the life of Poland's and Europe's patron saint, St. Adalbert, a bishop and martyr associated with the origins of Poland and with Gniezno, where his sanctuary, the oldest in Europe, is located. Saint Adalbert is one of the three main patron saints of the Church in Poland. He is known primarily for his martyrdom mission among the pagan Prussians and his later ransoming of his body for the proverbial widow's penny, shrouded in legend. There are 18 relief scenes on the door. The first nine sections tell the story of St. Adalbert's life before his arrival in Poland, i.e. his birth, education, youth and episcopal ministry, while the next 9 sections tell of his missionary expedition to the Prussian country, his martyrdom and burial in Gniezno. The whole thing is meant to allude to and evoke the life of Jesus Christ and has considerable theological and symbolic significance.