Verplaatsbaar trapje van enkele treden, waarop de priester kan staan bij de plaatsing in en het terugnemen uit de expositietroon op het tabernakel van de monstrans of de expositieciborie.Sets of steps used to provide access to an altar; particularly as used with altars in a temple or church. They may be permanent steps or a portable set of steps. The uppermost step is often decorated. The number of steps varies, but for symbolic reasons is typically an uneven number, usually three, five, or seven, including the upper platform.