Simple Prayer for Peace By St. Francis of Assisi on Archival Art Card Paper. How to Prepare for the Papal Visit. Archival Art Card Paper. 8.5x11 inches can be trimmed down to fit an 8x10 matt/frame. (trimmed/framed images are not included=only shown as display examples). The SImple Prayer for Peace was written in the 12th Century by St. Francis. St. Francis of Assisi is the namesake of Pope Francis. The Prayer of St. Francis was recited twice in the Clint Eastwood Movie 15:17 to Paris.