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As early as the fifth century B.C., the Chinese reported having observed dark spots on the sun. But it wasn't until 1610 that Galileo Galilei of Italy, Johannes Fabricius of Holland, Christopher Scheiner of Germany, and Thomas Harriott of England each independently made the first observations of sunspots (there is some debate over who really was the first to make the observations). All four men observed the solar blemishes through telescopes and made sketches of the sunspots changing shapes and locations. Daily observations were started at the Zurich Observatory in 1749 and, with the addition of other observatories, continuous observations were obtained starting in 1849.