This 64-arch neoclassical plaza, built in 1851, is known for its Sunday-morning flea market, December 21 Santo Tomás festivities, and restaurants. Note the size of the balconies (the bigger the balcony, the richer the original proprietor) and the tiny windows near the top of the facades, where servants' quarters would've been. The building behind the coat of arms (bearing the tree of Gernika, a symbol of Basque autonomy) houses the Euskaltzaindia, or Academy of the Basque Language. The bars and shops around the arcades include two Victor Montes establishments, one for pintxos at Plaza Nueva 8 and the other for sit-down dining at No. 2. Café Bar Bilbao (No. 6), aka Casa Pedro, has Belle Époque interiors accented by photos of early Bilbao, while Argoitia (No. 15), across the square, has a nice angle on the midday sun.