Sundays in the Old Center see a gathering of local artists who show their works under canvas just off the busy street of Spui. Standards and subject matter vary considerably as 25 artists from a pool of 60 exhibit each week. As well as predictable canal-side views badly executed in watercolor, you might find lovely ceramic bowls by Marc Wensma or wacky etchings from Janny Endstra, handmade ethnic jewelry, or silk-screen printing. You have to take potluck.