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From the early 12th century, French builders developed the Gothic style, marked by the use of rib vaults, pointed arches, flying buttresses, and large stained glass windows. It was used mainly in churches and cathedrals, and continued in use until the 16th century in much of Europe. Classic examples of Gothic architecture include Chartres Cathedral and Reims Cathedral in France as well as Salisbury Cathedral in England. Stained glass became a crucial element in the design of churches, which continued to use extensive wall-paintings, now almost all lost.
Among which builders was the Gothic style first used?
A: French

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The thermionic triode, a vacuum tube invented in 1907, enabled amplified radio technology and long-distance telephony. The triode, however, was a fragile device that consumed a lot of power. Physicist Julius Edgar Lilienfeld filed a patent for a field-effect transistor (FET) in Canada in 1925, which was intended to be a solid-state replacement for the triode. Lilienfeld also filed identical patents in the United States in 1926 and 1928. However, Lilienfeld did not publish any research articles about his devices nor did his patents cite any specific examples of a working prototype. Because the production of high-quality semiconductor materials was still decades away, Lilienfeld's solid-state amplifier ideas would not have found practical use in the 1920s and 1930s, even if such a device had been built. In 1934, German inventor Oskar Heil patented a similar device.
What was the purpose of the thermionic triode?
A: amplified radio technology and long-distance telephony

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The most widely used class of antenna, a dipole antenna consists of two symmetrical radiators such as metal rods or wires, with one side of the balanced feedline from the transmitter or receiver attached to each. A horizontal dipole radiates in two lobes perpendicular to the antenna's axis. A half-wave dipole the most common type, has two collinear elements each a quarter wavelength long and a gain of 2.15 dBi. Used individually as low gain antennas, dipoles are also used as driven elements in many more complicated higher gain types of antennas.
Besides low gain antennas, what is also used as driven elements in complicated higher gain types of antennas?
A: dipoles

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As the primary former Capital of the Confederate States of America, Richmond is home to many museums and battlefields of the American Civil War. Near the riverfront is the Richmond National Battlefield Park Visitors Center and the American Civil War Center at Historic Tredegar, both housed in the former buildings of the Tredegar Iron Works, where much of the ordnance for the war was produced. In Court End, near the Virginia State Capitol, is the Museum of the Confederacy, along with the Davis Mansion, also known as the White House of the Confederacy; both feature a wide variety of objects and material from the era. The temporary home of former Confederate General Robert E. Lee still stands on Franklin Street in downtown Richmond. The history of slavery and emancipation are also increasingly represented: there is a former slave trail along the river that leads to Ancarrow's Boat Ramp and Historic Site which has been developed with interpretive signage, and in 2007, the Reconciliation Statue was placed in Shockoe Bottom, with parallel statues placed in Liverpool and Benin representing points of the Triangle Trade.
What government building is the Museum of the Confederacy located near?
A:
Virginia State Capitol