1. British Empire - 33.7 million km sq (1946)
2. Russian Empire - 23.7 million km sq (1866)
3. Spanish Empire - 20.0 million km sq (1740-1790)
4. Ottoman Empire - 19.9 million km sq (1595)
5. Qing Empire, China - 14.7 million km sq (1790)
6. French Colonial Expansion - 12.3 million km sq (1938)
7. Portuguese Empire - 10.4 million km sq (1815)
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