By The Associated Press

          MEXICO CITY (AP) -- An ornate golden frame surrounds the rustic fabric made of cactus fiber.

          The cloth holds the revered image of the Virgin Mary said to have been created miraculously on the
          cloak of an Aztec peasant in 1531.

          As with the face said to be that of Christ on the Shroud of Turin, testing has been unable to explain
          the origin of the full-color image on the ``tilma.''

          Scientific testing has not found any trace of brush strokes to indicate the figure is a painting, as
          skeptics claim. An infrared examination done by U.S. researchers in 1979 showed no underlying
          preliminary drawings or layers of protective varnish.

          Dr. Juan Homero Hernandez, co-author of studies on the image, says the stars on the cloak
          correspond to northern and southern constellations as they appeared on Dec. 12, 1531, the date of
          the apparition. The golden outline of flowers on Mary's robe correspond to Aztec symbols pointing
          out key geographic features in central Mexico.

          A figure appearing at the foot of the Virgin Mary may symbolize Juan Diego, Hernandez says. The
          figure's wings are similar to eagle feathers, and Juan Diego's name before his conversion to
          Catholocism was Cuauhtlatoa, meaning ``eagle that speaks.''

          Believers say the present state of the tilma cannot be explained since the cactus fiber should have
          rotted after 20 years. Pollution, soot from candles and handling by devotees' hands early in the
          cloak's history have not darkened the image or caused its colors to fade, they say.

          In 1791, a worker cleaning the frame spilled nitric acid across the cloth, leaving behind only a
          watermark.

          In 1921, an anti-religious group hid a bomb in a flower vase at the foot of the image. It exploded
          during a Mass, damaging the altar but leaving the frame and cloth unharmed.

          Today, the cloth is protected by bulletproof glass.