1820s
- 1823 - Paris, France - Sixth Exposition (1823)
- 1827 - Paris, France - Seventh Exposition (1827)
- 1829 - New York City, United States - American Institute Fair
- 1829 - Turin, Piedmont-Sardinia - Prima Triennale Pubblica Esposizione dell’anno 1829. In Turin, a second 'triennale' followed in 1832 before other national agricultural, industrial, commercial, and applied arts expositions there in 1838, 1844, 1850 and 1858.
Read more about this topic: List Of World's Fairs