Our Lady of Loreto

According to the old Roman Martyrology, the Holy House of Loreto is commemorated today, i.e., "the translation of the holy house of Mary, the Mother of God, in which the Word was made flesh." The picture shows the shrine altar.

There's a nice little history of it here. There's one in the old Catholic Encyclopædia, too. But you'll have to look that one up yourself as it's another of grumpy old Herbert Thurston's jaundiced reviews.