Located at the entrance to the Barri Gòtic, on the quaint street Portal de l'Àngel, Mercería Santa Ana is the place to come to find all those little things: buttons, thread, yarn, wool, needles, braid, lace, tassels, and more. There's always a lot going on here: customers milling about and lots of clerks there helping them out (which is always a pleasure to see). Even if you're only curious it is worth it to come in and take a peek.