Ostensorium with “Paten of St. Bernward.” German (Lower Saxony [Hildesheim?]), ca. 1180-90 (paten); ca. 1350-1400 (monstrance). The Cleveland Museum of Art.
From the Treasures of Heaven exhibit:

This unusual ostensorium (from the Latin ostendere: to show) was made to facilitate the display and veneration of ten relics, most prominent among them an elaborate liturgical paten—a shallow plate for the elevation of the Eucharist during Mass—associated with St. Bernward of Hildesheim (d. 1022), and a relic of the True Cross.

On the back, eight more relics are visible:

They’re wrapped in silk and are identified—by an inscription on parchment accompanying the piece—as the remains of Saints Godehard, Nicholas, Auctor, Silvester, Servatius, John Chrysostom, Alexis, and Lawrence.

Ostensorium with “Paten of St. Bernward.” German (Lower Saxony [Hildesheim?]), ca. 1180-90 (paten); ca. 1350-1400 (monstrance). The Cleveland Museum of Art.

From the Treasures of Heaven exhibit:

This unusual ostensorium (from the Latin ostendere: to show) was made to facilitate the display and veneration of ten relics, most prominent among them an elaborate liturgical paten—a shallow plate for the elevation of the Eucharist during Mass—associated with St. Bernward of Hildesheim (d. 1022), and a relic of the True Cross.

On the back, eight more relics are visible:

They’re wrapped in silk and are identified—by an inscription on parchment accompanying the piece—as the remains of Saints Godehard, Nicholas, Auctor, Silvester, Servatius, John Chrysostom, Alexis, and Lawrence.