The meaning? Something that is reused. In the ancient days, parchment and vellum are expensive and are often reused with the traces of the original still remaining. Here on one of the walls of this church is a wall where at least 6 layers of frescoes can be identified. Santa Maria Antiqua was built in the 5th century and holds frescoes cycles of at least 3 centuries, 6th, 7th and 8th until it was destroyed by an earthquake in 847. It underwent a 36 year restoration from 1980 to 2016 and was reopened in March 2016. I had the privilege of seeing it in June this year.