Emblem of the Convention for the Protection of Cultural Property in the Event of Armed Conflict. - "The distinctive emblem of the Convention shall take the form of a shield, pointed below, per saltire blue and white (a shield consisting of a royal-blue square, one of the angles of which forms the point of the shield, and of a royal-blue (#4169E1) triangle above the square, the space on either side being taken up by a white triangle)." (article 16 first paragraph)
Own work
Jan Zachwatowicz, Poland