At Christian Heurich's mansion, near Dupont Circle, it looks as if the German-born brewer just stepped away -- back in 1894. Little has changed inside, from the plush patterned carpets to the pale painted ceilings. But now the "Brewmaster's Castle," the site of many a wedding and other happy event, is facing a serious threat from the modern world. Unless supporters of the Victorian-era museum raise $250,000 by Feb. 15, the property, at 1307 New Hampshire Ave. NW, will face foreclosure and might be sold, according to Friends of the Castle, a group trying to save the facility. The sale...