Home to more than 200 antiques dealers within eight blocks, the downtown district in Frederick, Maryland, with sweeping mountain views, offers a bounty of storefronts with the antiquing action heavily concentrated along two streets: East Patrick and East Carroll. On East Patrick, look to Silk&Burlap (silkandburlap.com) for its edgy farmhouse style, such as an 1800s farm table ($1,870) paired with mid-century Eiffel chairs in black, white, or charcoal gray ($134...