Centuries: 18th century - 19th century - 20th century
Decades: 1770s 1780s 1790s 1800s 1810s - 1820s - 1830s 1840s 1850s 1860s 1870s
Years: 1817 1818 1819 1820 1821 - 1822 - 1823 1824 1825 1826 1827
Arts, Sciences, Literature and Philosophy
Galileo Galilei's Dialogue taken off of the Index librorum prohibitorum, the Roman Catholic Church's list of banned books.
Ashley's Hundred leave from St. ...
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