Whispering-gallery wave Whispering-gallery wave Whispering-gallery waves, or whispering-gallery modes, are a type of wave that can travel around a concave surface. Originally discovered for sound waves in the whispering gallery of St Paul’s Cathedral, they can exist for light and for other waves, with important applications in nondestructive testing, lasing, cooling and sensing, as well as in astronomy. Whispering-gallery waves were first explained for the case of St Paul's Cathedral circa 1878 by Lord Rayleigh, who revised a previous misconception that whispers could be heard across the dome but not at any intermediate position. He explained the phenomenon of travelling whispers with
London Guarantee Building on April 16, 1996. The London Guarantee & Accident Building was designed by Chicago architect Alfred S. Alschuler and completed in 1923 for the London Guarantee & Accident Company, an insurance firm that was then its principal occupant. The top of the building is noted to resemble the Choragic Monument of Lysicrates in Athens, but it was modeled after the Stockholm Stadshus. It is located in the Michigan–Wacker Historic District. The building stands on the property formerly occupied by the Hoyt Building from 1872 until 1921. The LondonHouse Hotel name is an homage to the first owner of the 1923