I didn't know this plant was considered a weed and it came to my attention when a young leaf was recently likened to Nipplewort Lapsana communis). They are not related and Nipplewort is a small garden annual that is edible.
I wanted to share this piece from an article on 'Classics in your garden' by University of Canterbury student
Laura Bythell.
Acanthus mollis is also known as Bears breeches: (Greek: ἄκανθος – akanthos. Latin: acanthus)
This leafy weed is a menace in New Zealand gardens. (How many people know this I wonder?) However, long before it made its way to our shores, acanthus was a popular motif in Greek, Roman and even Byzantine architecture. One of the most common places you can spot acanthus is in the capitals of Corinthian columns, a design which is credited to the Greek sculptor Callimachus. According to Roman author Vitruvius, Callimachus was inspired when he saw an acanthus plant growing in an unusual way; a basket had been placed upon an acanthus root and a tile placed upon the basket in order to preserve its contents. This caused the acanthus to grow up and around the basket and bend beneath the tile as if it were supporting it. Callimachus was apparently taken with this, and created a new design for the Corinthian column.