Naples's Jewish community in the 1920s comprised almost 1,000 members.
The community comprises some 13 English-speaking countries with a total population of five million.
Such communities rarely comprised more than 200 or 300 people, of whom many if not most were blood relatives.
Those three communities are adjacent to one another and together comprise a population estimated at 18,000 in 1996.
It was a large community, comprising at its height some 130 monks.
Thessaloniki's Jewish community comprised more than half of the city's population by the early 1900s.
Its only remaining community, Nikolski, comprised the island's entire population.
In the early 1880s, the community comprised approximately forty houses and had an estimated population of 150 residents.
As of 2011, it was reported that the Bahá'í community comprised about 8,000 followers.
He is also founder of Wordsmith.org, an online community comprising word lovers from an estimated 200 countries.