How many world's fairs were there?

Answer 1

As of October 2023, there have been over 170 recognized world's fairs, also known as international exhibitions or expos, since the mid-19th century. These events are organized under the auspices of the Bureau International des Expositions (BIE), which was established in 1928. The first significant world's fair, the Great Exhibition, took place in London in 1851. These fairs showcase advancements in technology, culture, and industry from participating nations.