text: Medieval monstrances were more varied in form than contemporary ones. Those used for relics, and occasionally for the host, typically had a crystal cylinder in a golden stand, and those usually used for hosts had a crystal window in a flat-faced golden construction, which could stand on its base. The monstrance was most often made of silver-gilt or other precious metal, and highly decorated. In the center of the sunburst, the monstrance normally has a small round glass the size of a host, through which the Blessed Sacrament can be seen. Behind this glass is a holder made of gilded metal, called a lunette or lunula, which holds the host securely in place. When not in the monstrance, the host in its lunula is placed in a special standing container, called a standing pyx, in the Tabernacle. Before the current design, earlier "little shrines" or reliquaries of various shapes and sizes were used.
  Noted monstrances
  The monstrance of Corpus Christi at the Cathedral of Valencia (Spain) - Every year, during the Corpus Christi procession in Valencia, the largest Monstrance in the world, made of  of silver,  of gold,  of platinum, hundreds of precious stones and thousands of pearls, runs through the streets of Valencia under a shower of flower petals.