Question: When was the first recorded use of a telescope?
About the article "Telescope", section "History".

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The telescope was located on the grounds of Observatory House, Herschel's house in Slough, between 1789 and 1840.
The first observation with the telescope was on 19 February 1787, when Herschel pointed the then-incomplete telescope towards the Orion nebula, which he observed by crawling into the telescope and using a hand-held eyepiece:The one achievement of the telescope was to discover Enceladus and Mimas, the 6th and 7th moons of Saturn, although this is not certain, as Herschel used other telescopes at the same time.
Herschel described the view of Sirius through the telescope:As part of the funding deal with the telescope, Caroline Herschel was granted a pension of £50 per year to be William's assistant.
As a result, she was the first woman in England to be paid to carry out astronomy.
The telescope was a local tourist attraction, visited by rich and famous people on their way to the nearby Windsor Castle to visit the King, and was featured on Ordnance Survey maps.
It was the largest telescope in the world for 50 years.
It was called the "40-foot telescope" as at the time telescopes were referred to by the length of their tube rather than the diameter of the mirror.
Due to problems with the mirrors and because the telescope was unwieldy, the telescope did not prove to be a substantial improvement over smaller telescopes.
The weather was rarely suitable for the telescope, and most objects observed by Herschel were also visible in his smaller telescopes.
The final observation made by the telescope was in 1815.
The telescope was featured in Herschel's coat of arms: 
The Rooftop Telescope is a 9.5-inch refractor that was originally constructed in 1894 by Warner and Swasey for their own use.
The telescope was the first instrument of the Warner and Swasey Observatory and was originally used at the Taylor Road facility, but was put into storage when the Astronomy Department of Case Western Reserve University was relocated to the A. W. Smith building on the main campus.
In 1986 the telescope was reinstalled in a new dome on the roof of the A. W. Smith building.
The telescope remains in excellent condition today and is available for use by all students, faculty, and staff at CWRU once they go through a seminar on proper telescope use.
It is also often used for public observing nights by the university's Physics and Astronomy Club. 
  3.9 m Anglo-Australian Telescope (AAO), operational in 1975  1.24 m UK Schmidt Telescope (AAO)  2.0 m Faulkes Telescope South (LCOGT)  1.3 m SkyMapper Telescope (ANU), when launched in 2009 was the first new optical, research grade telescope in Australia since 1984.
2.3 m Advanced Technology Telescope (ANU), was built in 1984  Multiple - iTelescope.
Net (iTelescope Network), Internet connected remote telescopes for the Public.
Built 2013  4 x 0.4 m" Telescopes PROMPT Telescopes (The University of North Carolina), Built 2013  HAT-South Telescope Network (ANU, CfA, MPIA)  SOLARIS Telescope (Nicolas Copernicus Astronomical Centre - Poland.
Built 2012)  0.5 m Uppsala Southern Schmidt Telescope (ANU – decommissioned 2013)  0.5 m Automated Patrol Telescope (UNSW – decommissioned 2012)  0.45 m ROTSE IIIa, Robotic Optical Transit Search Experiment (UNSW - – decommissioned 2011)  Korean YSTAR Telescope (Korean Southern Observatory)  40 inch Telescope (ANU), was first commissioned in 1963 currently decommissioned and moved to Millroy Observatory for use by amateurs.
24 inch Telescope (ANU – decommissioned)  16 inch Telescope (ANU – decommissioned)  
This is a 0.61m fork mounted reflecting telescope operating at f/16.
This telescope is used exclusively for CCD photometry.
It is currently being upgraded and commissioned for robotic use as part of the AAVSO's Robotic Telescope Network.
This is the AAVSO's first Southern Hemisphere telescope. 
The Anna L. Nickel telescope is a 1-meter reflecting telescope located at Lick Observatory in the U.S. state of California.
The smaller dome on the main building at Lick had originally held the secondhand 12-inch Clark refracting telescope, the first telescope to be used at Lick.
In 1979 it was replaced with the Anna L. Nickel telescope, a 1-meter reflecting telescope.
The telescope is named for Anna L. Nickel, a San Francisco native who donated $50,000, a large portion of her estate, to the Observatory.
The Nickel telescope was built entirely by UC Santa Cruz personnel and utilized many spare parts, including a replacement mirror for the Crossley Reflector.
It eased demand for time on the 120-inch C. Donald Shane telescope by taking on research programs that do not require the Shane's greater light-gathering power.
Due to its optical design, it can use the same instruments as the Shane so instruments can be tested on it.