"Over the past 40 years, Pennsylvania has exhibited leadership in preserving major historical sites of national importance, as well as supporting local historic districts that help preserve the unique character of Pennsylvania's communities. It's what makes them attractive places to live and work. The state's most successful downtowns, main streets and livable communities are flourishing today, in large part, because historic preservation efforts helped preserve what is distinctive about these places."  For the complete Harrisburg Patriot-News column, please click here.