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
Faras Gallery at the National Museum in Warsaw Faras Gallery at the National Museum in Warsaw The Professor Kazimierz Michałowski Faras Gallery at the National Museum in Warsaw is a permanent gallery at the National Museum in Warsaw, presenting Nubian early Christian art. The Gallery features a unique collection of wall paintings and architectural elements from the Faras Cathedral, discovered by an archeological mission led by Professor Kazimierz Michałowski. Most of the artworks shown in the Faras Gallery found their way there thanks to the archaeologists participating in the international effort to save the remains of old Nile basin cultures, known as the Nubian Campaign. The Nubian Campaign