Luchesius Modestini

Luchesius Modestini, TOSF (also Luchesio, Lucchese, Lucesio, Lucio, or Luchesius of Poggibonsi) (c. 1180 - 1260) is honored by tradition within the Franciscan Order as being, along with his wife, Buonadonna de' Segni, the first members of the Franciscan Order of Penance, most commonly referred to as the Third Order of St. Francis.

Many miracles are claimed to have occurred at Modestini's shrine in the Franciscan church at Poggibonsi. Pope Gregory X approved his beatification in 1274.