The Convento de Santa Dorotea is an Augustinian nun's convent in Burgos. It is a Gothic construction, and dates back to 1387, when Dorotea Rodriguez Valderrama, along with other devout women formed a nun's community at the old church of Santa Maria la Blanca. The community adopted the rule of St. Augustine in 1429 with the support of Bishop Pablo de Santamaría. In 1457 they moved to the church of San Andrés, until in 1470 they settled in the current location in the barrio of San Pedro y San Felices. Among the many benefactors who favored the monastery was King John II of Castile. Tombs of note include those of Alonso de Ortega (died 1501), and Bishop Juan de Ortega, the work of Nicholas de Vergara, 1516.References:
The city walls of Avila were built in the 11th century to protect the citizens from the Moors. They have been well maintained throughout the centuries and are now a major tourist attraction as well as a UNESCO World Heritage Site. Visitors can walk around about half of the length of the walls.
The layout of the city is an even quadrilateral with a perimeter of 2,516 m. Its walls, which consist in part of stones already used in earlier constructions, have an average thickness of 3 m. Access to the city is afforded by nine gates of different periods; twin 20 m high towers, linked by a semi-circular arch, flank the oldest ones, Puerta de San Vicente and Puerta del Alcázar.