The 1800s was a Decade. The term is also used to refer to the period between 1800 and 1899, which is almost synonymous with the 19th century (1801 to 1900).
The 1800s was a Decade. The term is also used to refer to the period between 1800 and 1899, which is almost synonymous with the 19th century (1801 to 1900).