Please explain: what is a monstrance?

World-Record Monstrance in Louisiana

What is a Monstrance? | The Significance of Eucharistic Adoration

Largest monstrance in the world

Pope Leo Blesses with the Eucharist in the Monstrance | Eucharistic Benediction on Corpus Christi

Watch what happens to the door of the monstrance. #jesuschrist #jesus #jesuslives #jesusisking

The monstrance #catholic #worship #holyeucharist #religion #catholicculture #catholicchurch #church