preeminent symbol in this illustration is the monstrance containing
Our Lady, and simultaneously Mary containing and pointing to the
radiating host on her chest. The Immaculata (see twelve stars) is
herself a monstrance, meaning transparent of and to God. It is her
honor to make God visible through her sinlessness and as dwelling
place of the Holy Spirit and her Son Jesus Christ. Mary is,
according to 2 Timothy 21 (paraphrased here), “a vessel for lofty
use (vas in honorem), dedicated, beneficial to the master of the house."
The master of the house here is Christ himself, present in the host
held by the “vessel of honor," his mother Mary. She is
indeed, as Immaculata, the work of the Almighty One, and thus an
“admirable vessel." Monstrances with a Marian motif are
typical of the Baroque period (see for example the famous Lepanto
monstrance by J. Zeckel, 1708, Ingolstadt).