Dating from the mid-19th century, Porto's former stock exchange contains a wealth of historic interest. Built on the site of a Franciscan monastery, its sumptuous interior is divided into several rooms and salons, each one singular in its appeal and worthy of close scrutiny. Pretend you're a wealthy merchant visiting on business as you wander through the Portrait Room with its gallery of uniformed monarchs, and then cast your eyes skywards after entering the Golden Room to admire its gilded stucco ceiling. You'll be ready for your meeting with the boss in the lavishly furnished Chairman's Room before joining fellow merchants in the richly decorated Court Hearing Room to witness mercantile law acted out in due process. You may want to pop into the adjacent Juror's Room before gathering in the magnificent Hall of Nations to mingle with the great and the good.