Paris, Right Bank, late October. The neighborhood: L'Arsenal. Along the river, toward the eastern end of the Ile Saint-Louis and along the Seine, a huge grange or warehouse was built in the 1500s and in it cannons were manufactured. And gunpowder too, of course. In 1563 the building exploded, and the sound was heard for many miles around.
The neighborhood is a lot quieter these days. If you're walking from the Marais over to the Gare d'Austerlitz, you can stop in at the Café Sully for refreshments. Now that I've looked at the web site and the menu, I wonder why I've never had lunch there. Next time, maybe. Right next door, there's an information center, Le Pavillon de l'Arsenal, with displays that show different aspects of the history and evolution of Paris architecture and urban planning. It's free, and it's very interesting. Go.
If you need a kilo of potatoes or oranges, or whatever, stop in chez Ben l'Epicier ("Ben the Grocer's place") on your way to the train station. Ben Maamar Abderrazak's shop is at 12, boulevard Morland, métro Quai de la Rapée, not far from the Pont d'Austerlitz and the station.