The practical discovery of the instrument was certainly made in Holland about 1608, but the credit of the original invention has been claimed on behalf of three individuals, Hans Lippershey and Zacharias Jansen, spectacle-makers in Middelburg, and James Metius of Alkmaar (brother of Adrian Metius the mathematician) .
Descartes, in his treatise on Dioptrics (1637), attributes the discovery to Metius "about thirty years ago," whilst Schyraelus de Rheita, a Capuchin friar, in his Oculus Enoch et Eliae (Antwerp, 1645), gives the credit to Lippershey about 1609.
Jansen and his father were the real inventors of the telescope in 1610, and that Lippershey only made a telescope after hints accidentally communicated to him of the details of Jansen's invention.
Among the acts of the states-general preserved in the government archives at The Hague, Van Swinden found that on 2nd October 1608 the assembly of the states took into consideration the petition of Hans Lippershey, spectacle-maker, a native of Wesel and an inhabitant of Middelburg, inventor of an instrument for seeing at a distance.
On 4th October a committee was appointed to test the instrument, and on the 6th of the same month the assembly agreed to give Lippershey goo florins for his; instrument.