I sadly didn’t have time to explore Old Lille, only to walk back to the station by way of the Grand Place, where I was impressed not so much by the decorative strapwork of the Vieille Bourse, designed and decorated by Julien Destrée in 1653, as the decorative language of a house in a street immediately to the north:-

I also liked the detail on the original shop front of A la Cloche d’Or, including the ancient advertising for Omega watches:-