Guglielmo Giovanni Maria Marconi, 1st Marquis of Marconi was an Italian inventor and electrical engineer, known for his creation of a practical radio wave–based wireless telegraph system. This led to Marconi's being credited as the inventor of radio, and he shared the 1909 Nobel Prize in Physics with Karl Ferdinand Braun "in recognition of their contributions to the development of wireless telegraphy".
The early history of radio is the history of technology that produces and uses radio instruments that use radio waves. Within the timeline of radio, many people contributed theory and inventions in what became radio. Radio development began as "wireless telegraphy". Later radio history increasingly involves matters of broadcasting.
Wireless telegraphy or radiotelegraphy is transmission of text messages by radio waves, analogous to electrical telegraphy using cables. Before about 1910, the term wireless telegraphy was also used for other experimental technologies for transmitting telegraph signals without wires. In radiotelegraphy, information is transmitted by pulses of radio waves of two different lengths called "dots" and "dashes", which spell out text messages, usually in Morse code. In a manual system, the sending operator taps on a switch called a telegraph key which turns the transmitter on and off, producing the pulses of radio waves. At the receiver the pulses are audible in the receiver's speaker as beeps, which are translated back to text by an operator who knows Morse code.
Amos Emerson Dolbear was an American physicist and inventor. Dolbear researched electrical spark conversion into sound waves and electrical impulses. He was a professor at University of Kentucky in Lexington from 1868 until 1874. In 1874 he became the chair of the physics department at Tufts University in Medford, Massachusetts. He is known for his 1882 invention of a system for transmitting telegraph signals without wires. In 1899 his patent for it was purchased in an unsuccessful attempt to interfere with Guglielmo Marconi's wireless telegraphy patents in the United States.
Alexander Stepanovich Popov was a Russian physicist who was one of the first people to invent a radio receiving device.
Mount Pleasant is a neighborhood in Washington, D.C., located in Northwest D.C. The neighborhood is primarily residential, with restaurants and stores centered along a commercial corridor on Mt. Pleasant Street. Mount Pleasant is known for its unique identity and multicultural landscape, home to diverse groups such as the punk rock, the Peace Corps and Hispanic Washingtonian communities.
The Piccirilli brothers were an Italian family of renowned marble carvers and sculptors who carved many of the most significant marble sculptures in the United States, including Daniel Chester French’s colossal Abraham Lincoln (1920) in the Lincoln Memorial, Washington, D.C.
The invention of radio communication was preceded by many decades of establishing theoretical underpinnings, discovery and experimental investigation of radio waves, and engineering and technical developments related to their transmission and detection. These developments allowed Guglielmo Marconi to turn radio waves into a wireless communication system.
Thomas Circle is a traffic circle in Northwest Washington, D.C., United States. It is located at the intersection of 14th Street, M Street, Massachusetts Avenue, and Vermont Avenue NW. A portion of Massachusetts Avenue travels through a tunnel underneath the circle. The interior of the circle includes the equestrian statue of George Henry Thomas, a Union Army general in the Civil War.
Attilio Piccirilli was an American sculptor. Born in Massa, Italy, he was educated at the Accademia di San Luca of Rome.
The Peace Monument, also known as the Navy Monument, Naval Monument or Navl-Peace Monument, stands on the western edge of the United States Capitol Complex in Washington, D.C. It is in the middle of Peace Circle, where First Street and Pennsylvania Avenue NW intersect. The surrounding area is Union Square, which the monument shares with the Ulysses S. Grant Memorial, James A. Garfield Monument, and the Capitol Reflecting Pool. The front of the monument faces west towards the National Mall while the east side faces the United States Capitol.
Sheridan Circle is a traffic circle and park in the Sheridan-Kalorama neighborhood of Washington, D.C. The traffic circle, one of two in the neighborhood, is the intersection of 23rd Street NW, Massachusetts Avenue NW, and R Street NW. The buildings along this stretch of Massachusetts Avenue NW are part of Embassy Row, which runs from Scott Circle to Observatory Circle. Sheridan Circle is a contributing property to the Massachusetts Avenue Historic District and the Sheridan-Kalorama Historic District, both listed on the National Register of Historic Places (NRHP). In addition, the equestrian statue of General Philip Sheridan is 1 of 18 Civil War Monuments in Washington, D.C., that were collectively listed on the NRHP.
Augusto Righi was an Italian physicist and a pioneer in the study of electromagnetism. He was born and died in Bologna.
Georg Wilhelm Alexander Hans Graf von Arco was a German physicist, radio pioneer, and one of the joint founders of the "Society for Wireless Telegraphy" which became the Telefunken company. He was an engineer and the technical director of Telefunken. He was crucial in the development of wireless technology in Europe.
The Haven Hotel is a historic AA four star hotel in Sandbanks, near Poole, Dorset on the south coast of England.
Joseph Maria Pernicone was an Italian-born clergyman of the Roman Catholic Church. He served as an auxiliary bishop of the Archdiocese of New York from 1954 to 1978.
The Luther Monument is a public artwork located in front of Luther Place Memorial Church in Washington, D.C., United States. The monument to Martin Luther, the theologian and Protestant Reformer, is a bronze, full-length portrait. It is a copy of the statue created by Ernst Friedrich August Rietschel as part of the 1868 Luther Monument in Worms, Germany. The version in Washington, D.C., inspired the installation of many other castings across the U.S. The statue is a contributing property to the Luther Place Memorial Church's listing on the National Register of Historic Places (NRHP) and District of Columbia Inventory of Historic Sites (DCIHS). It is also a contributing property to the Greater Fourteenth Street Historic District, which is also listed on the NRHP and DCIHS.
Brigadier General Thaddeus Kościuszko is a bronze statue honoring Polish military figure and engineer Tadeusz Kościuszko. The sculpture was dedicated in 1910, the third of four statues in Lafayette Square, Washington, D.C., to honor foreign-born heroes of the American Revolutionary War. Born in the Polish–Lithuanian Commonwealth in 1746, Kościuszko later received education at a Jesuit school before attending the Corps of Cadets in Warsaw. He later traveled to France where he studied in military academy libraries and adopted views of human liberty during the Age of Enlightenment. He moved to the Thirteen Colonies in 1776, where the war with the Kingdom of Great Britain had already begun. Kościuszko served as an engineer in the Continental Army, earning the praise of his superiors, including General George Washington.
Furio Piccirilli was an Italian-born American sculptor and one of the Piccirilli Brothers.
Elettra was the name of Guglielmo Marconi's steam yacht – a seaborne laboratory – from which he conducted his many experiments with wireless telegraphy, wireless telephony and other communication and direction-finding techniques during the inter-war period.
