1985 and is also housed in the church's upstairs gallery. It is named after its builder, Charles Brenton Fisk, and for Herbert Nanney, who was the church's organist for 39 years. Although it was commissioned in 1973, its completion was delayed for many years, due to logistical, financial, and construction issues. The organ's case is made of poplar wood and its almost 4,500 pipes are made of varying sizes of lead and tin. Its keyboards, which Morgan calls the "flight deck," are made with grenadilla, with rosewood making up its natural and sharps, and are capped with bone. The organ's keyboards are black on white, instead of the modern white on black. The stop controls create "a huge array of sounds". The Fisk-Nanney is a four-manual Baroque-type organ with 73 ranks. It uses a "combination of elements from historic East German, North German, and French organs plus dual temperaments", and is "the first instrument in the history of organ building that is capable of reproducing nearly all organ music written from the 16th through the 18th centuries". The organ, which "has remarkable complexity", features both French- and German-style reeds and principal choruses. It is equipped with a Brustpositiv division in meantone temperament. A lever allows the remaining divisions to alternate between well temperament and meantone temperament, a feature made possible by the inclusion of five extra pipes (two for each sharp key) per octave. Morgan describes the organ's sound as "delicious" and "visceral", ringing with "'incredible clarity' and 'dark color'", and compares it to driving a Maserati. He insists that the best place to listen to the Fisk-Nanny is not upstairs in the gallery where it sits, but in the church, "about halfway down the nave". In 2005 Morgan performed the complete organ works of Dieterich Buxtehude during a series of recitals, eight hours in all, to celebrate the organ's 20th anniversary. During the 2009–2010 school year, Morgan commemorated the 25th anniversary of the Fisk-Nanney organ and his 10th year at Stanford in a concert series of the complete organ works of Johann Sebastian Bach, which took 18 hours to complete. Memorial Church's third organ, the Katherine Potter-Brinegar organ, was built in 1995 and was named for the spouse of Stanford alumni Claude S. Brinegar. It "further enhances" the diversity of the organs in Stanford Memorial Church, and was inspired by a famous chamber organ designed by German organ maker