Kathleen Bittner wears a garland of amber around her collar like a regal monarch, and her light eyes peer out happily behind delicate black frames as she welcomes customers into her store. She’s the benevolent queen of her domain, the Polish Art Center, and knows her kingdom well. Point to an object, and she’ll tell you the folk history, from which part of Poland it originates, and how it works. As Bittner watches her customers poke around the food section of her store, she doesn’t hesitate to call merrily, “Try one! They’re on my counter! You can try one, they’re delicious. It’s apricot marmalade. It’s really, really good.”