Lord, and that after the consecration they are the true body of Christ This profession of faith began a "Eucharistic Renaissance" in the churches of Europe. The Franciscan archives credit Saint Francis of Assisi (who died in 1226) for starting Eucharistic Adoration in Italy. It then spread from Umbria to other parts of Italy. In 1264 Pope Urban IV instituted the feast of Corpus Christi ("the Body of Christ") with the publication of the papal bull Transiturus. He asked the Dominican theologian Thomas Aquinas to write the texts for the Mass and Office of the feast. This included such famous hymns as Panis angelicus and Verbum Supernum Prodiens, the last two strophes of which form the Benediction hymn O Salutaris Hostia. The last two verses of Pange Lingua are sung as the hymn Tantum Ergo, also used at Benediction. As of the fourteenth century in the Western Church, devotions began to focus on the Eucharistic gifts as the objective presence of the risen Christ and the Host began to be elevated during the liturgy for the purpose of adoration, as well as to be seen by the congregation since the priest stood facing the same direction in front of the altar. 16th–18th centuries In the 16th century, the Protestant Reformation was challenging various issues with respect to the Eucharist and in response the Council of Trent greatly emphasized the presence of Christ in the Eucharist, the theological basis for Eucharistic adoration. The Trent declaration was the most significant theological component of Eucharistic doctrine since the apostolic age. The statement included the following: The other sacraments do not have the power of sanctifying until someone makes use of them, but in the Eucharist the very Author of sanctity is present before the Sacrament is used. For before the apostles received the Eucharist from the hands of our Lord, He told them that it was His Body that He was giving them. The Council then declared Eucharistic adoration as a form of latria: Following the Council of Trent, figures such as Saints Charles Borromeo and Alain de Solminihac promoted Eucharistic devotion and adoration. As part of the simplification of Church interiors, and to emphasize the importance of the Blessed Sacrament, Charles Borromeo initiated the practice of placing the tabernacle at a higher, central location behind the main altar. As Eucharistic adoration and Benediction became more widespread during the 17th century, the altar