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 The modernisation was funded by Wojciech Pawłowski. The Faras Gallery was reopened under the auspices of UNESCO and the Minister of Culture and National Heritage Małgorzata Omilanowska. Room I presents objects found at the Faras Cathedral, such as the frieze fragment from the apse of the First Cathedral; the founding inscription of bishop Paulos (commemorating the renovation of the Cathedral in 707 AD, "a holy Catholic place and a church of the Apostles of God"), stone blocks with inscriptions, and other elements. These objects are directly related to the history of the cathedral and its numerous building stages, happening from