Saltire detected the symbol, which often appears with balls in the quadrants formed by the arms of the chi-cross, in standards that appear on the coins of Persepolis. She suggested that early Christians endorsed its solar symbolism as appropriate to Christ. She also wrote: "although it cannot be proved, ... in the white saltire of St. Andrew we still have a reminiscence of the old standard of the Persepolitan kingdom". In the old European Union standard, a black saltire set in an orange square is the hazard symbol for irritants (Xi) or harmful chemicals (Xn). It indicates a hazard less severe
Portrait of a Lady in Yellow Portrait of a Lady in Yellow Portrait of a Lady in Yellow was painted by the Florentine artist Alesso Baldovinetti sometime in the second half of the 15th century, most likely c. 1465. For centuries the work was mis-attributed; it was purchased by the National Gallery London in 1866 as a portrait of Countess Palma of Urbino, attributed to Piero della Francesca. In 1911 art historian Roger Fry established that it was by Baldovinetti. However, there is no evidence of the source of the commission, and doubt remains as to the identity of the sitter; the most plausible theory is