Young Therese petitioning the Pope Leo XIII for entrance to Carmel at the age of 15. © SalveMaterDei.com, 2012 Published September 22, 2012 at 404 × 304 in Young Therese petitioning the Pope Leo XIII for entrance to Carmel at the age of 15. © SalveMaterDei.com, 2012 Young Therese petitioning the Pope Leo XIII for entrance to Carmel at the age of 15. This beautiful stained glass window is one of a series on the life of the saint that will soon grace the St. Therese Chapel at the Basilica of the National Shrine of Mary at Holy Hill. © SalveMaterDei.com, 2012. Stained glass of St. Therese and Pope Leo XIII at Holy Hill.