The whole village of Ayllón is a monument, and of course its churches and convents. The best thing is that you discover it for yourself.
The whole villa is a monument. But you have to enter the parish church of San Miguel, which preserves a series of illustrious Ayllonese burials from the 13th to the 16th centuries. Nearby, the church of Santa María la Mayor, which stands out for its unique bulrush of 40 meters high. Inside, a good altarpiece on the high altar with several images. A little further on, the Convent of the Immaculate Conception, founded by the Marquis of Villena in 1528. A good number of relics are kept. In the ruins of the church of San Juan, there are several Renaissance tombs. Also in ruins is the former Convent of San Francisco, whose foundation, in 1214, is due, according to tradition, to the same saint. It was visited on occasion by San Vicente Ferrer. According to the "chronicles" of Father Francisco Calderón, literally transcribed by the Segovian historian Teodoro García García in his book "History and traditions of Ayllón and his land", San Francisco came to Spain at 1214 to visit the sepulcher of Santiago, and after traveling through different locations, he went from Arévalo to Madrid and from here he came to Ayllón, where he stopped "many days and from his hand he founded a convent and built a church, humble factory"; He also made a small orchard, built a well and planted an elm tree, all in an area immediately on the road that leads to Aranda de Duero. The essential part of the building, whose ruins today are preserved and give an idea of the importance it had, was made between 1733 and 1738, after the fire suffered. Then came years of disgrace at the time of Charles III and the infamous Mendizábal Decree of 1835 abolishing religious communities and proceeding to the sale of their property.
St. Francis of Assisi (1182-1226) founded the order of Friars Minor. Disposing of all his goods, he put on a sackcloth and became an apostle of the poor. He was the author of a wonderful "song of the creatures" or "Song of the Brother Sun". He made a plastic representation of the birth of Jesus, according to Saint Luke, and hence the creation of "cribs" is attributed to him.