Simón de León Leal explained

Simón de León Leal (1610–1687) was a Spanish painter of the Baroque period. He was born in Madrid to Diego de León Leal (originally from the Principality of Catalonia) and Juana de Durán (according to Palomino). He was a pupil of Pedro de Las Cuevas. He was known for both portraits and history paintings.

For the Premonstratensian Friars he painted an altarpiece representing Saint Norbert triumphing over Heresy and a St. Norbert receiving vestments from the hands of the Virgin. For the church of the Noviciado Gesuita he painted an altarpiece of scenes from the Infancy of Christ, and for the church of the Capuchins, an Immaculate Conception. He was appointed painter to the queen. He died in Madrid.

References

• Antonio Palomino, An account of the lives and works of the most eminent Spanish painters, sculptors and architects, 1724, first English translation, 1739, p. 124*Book: Bryan, Michael. 1889. Dictionary of Painters and Engravers, Biographical and Critical . II L-Z . Walter Armstrong . Robert Edmund Graves . 43 . George Bell and Sons. London .
• Nicolau Castro, Juan, «Una obra firmada por el pintor madrileño Simón León Leal y precisiones sobre otras pinturas existentes en Toledo», Boletín del Seminario de Estudios de Arte y Arqueología, vol. 58, 1992, p. 425-430.