Amsterdam is sometimes called the 'Miracle City'. The Dutch capital has not earned this name on account of its permissive image, but because it has been a place of pilgrimage since the Middle Ages. According to tradition, on 15 March 1345, a man lay seriously ill in his house on the Kalverstraat. Thinking he was about to die he called for a priest to administer the last rites, including the Blessed Sacrament. After receiving the host, the man became sick and finally vomited. As was the custom, what he had brought up was thrown on the fire. The next morning the host was discovered undamaged in the ashes. It was put into a box and taken by a priest to the parish church (the present-day Oude Kerk), but on two occasions miraculously made its way back to the house on the Kalverstraat. This was the beginning of the tradition known in Amsterdam as the Micracle Procession, since people had taken it as a sign that they should spread word of what had happened. Some years later a chapel was built on the site of the miracle. The veneration of this mediaeval micracle meant that Amsterdam became an important centre of pilgrimage and people came from far and wide to take part in the large and magnificent Procession. However, in 1578 Amsterdam city council decided to convert to Protestantism. Catholic services were forbidden and Mass was said in clandestine churches. But the tradition of the Miracle was so important to the people of Amsterdam that during the 17th and 18th centuries they managed to perpetuate its annual celebration and veneration on a limited scale. The traditon was continued by a small group in the clandestine church in the Beguinage and individuals walked the route previously taken by the Procession. In 2018 the Silent Walk will be on March 17.
Each year, the festival week of the Miracle begins on the Wednesday after the 12th of March. From Wednesday through Saturday, holy masses of devotion are celebrated in the Beguinage. But the big yearly manifestation is still the Silent Procession, held on Saturday night through Sunday morning. Pilgrims travel in buses from all over the Netherlands to the centre of Amsterdam. They first participate in a mass in one of the parish churches of Amsterdam and later take part in the Silent Procession at different times in the night, following the route. The main characteristic of this 'round' or procession is the fact that it is done in silence, without loud prayers or songs and without clerical attire or other religious attributes. It takes about an hour to complete the round and it is done between midnight an four o'clock on Sunday morning.