Whispering gallery to the walls, an effect that was discovered in the whispering gallery of St Paul's Cathedral in London. The extent to which the sound travels at St Paul's can also be judged by clapping in the gallery, which produces four echoes. Other historical examples are the Gol Gumbaz mausoleum in Bijapur and the Echo Wall of the Temple of Heaven in Beijing. A hemispherical enclosure will also guide whispering gallery waves. The waves carry the words so that others will be able to hear them from the opposite side of the gallery. The gallery may also be in the form
Gallery 30 collection of local and regional fine art by placing a greater emphasis on Pennsylvania and Gettysburg-related subject matter. In 2013, Atiyeh expanded Gallery 30 by moving the business to a larger historic building at 26-28 York Street, next door to Gallery 30's original location. In April 2015, The historic 19th Century building that originally housed Gallery 30 is located at 30 York Street, also known as US Route 30 and the historic Lincoln Highway, in Gettysburg, Pennsylvania. The brick building bears an official plaque that verifies it as a Civil War building that was standing during the Battle of Gettysburg