Links There are many online resources for property owners interested in researching and preserving their historic building. They include: www.greatnecklibrary.org American Institute of Architects www.aia.org Long Island Traditions www.longislandtraditions.org National Trust for Historic Preservation www.nthp.org National Park Service Technical Services www.cr.nps.gov www.cr.nps.gov - Link 2   National Register of Historic Places http://www.cr.nps.gov/nr/ New York Landmarks Conservancy www.nylandmarks.org New York State Historic Preservation Office www.nysparks.state.ny.us Preservation League of New York www.preservenys.org/publications.htm Society for Preservation of Long Island Antiquities www.splia.org/index.html Although we cannot recommend specific companies that manufacture appropriate windows, doors and other materials, there are a number of online discussion groups where owners share their experiences.  These include: Old House Journal www.oldhousejournal.com Preservation Directory www.preservationdirectory.com Restoration Trades www.restorationtrades.com