Teresa asked John to delay his entry into the Carthusian order and to follow her. Having spent a final year studying in Salamanca, in August 1568 John travelled with Teresa from Medina to Valladolid, where Teresa intended to found another convent. After a spell at Teresa's side in Valladolid, learning more about the new form of Carmelite life, in October 1568, John left Valladolid, accompanied by Friar Antonio de Jesús de Heredia, to found a new monastery for Carmelite friars, the first to follow Teresa's principles. They were given the use of a derelict house at Duruelo, which had been donated to Teresa. On 28 November 1568, the monastery was established, and on that same day, John changed his name to "John of the Cross".