Europeans who regarded a country as a career rather than a cause

Like the Mavrocordato, the Testa refused to be imprisoned in one nationality. They were an extreme example of a once common phenomenon: Europeans who regarded a country as a career rather than a cause. Hereditary diplomats, they worked in Constantinople  because it was a centre of diplomacy as, in the eighteenth century, foreigners worked in Paris because it was a centre of fashion (intellectual, artistic and vestimentary). The Testa's primary loyalties were to the city [Constantinople], the Catholic religion, and whichever power they were serving at the time.

P. Mansel, Constantinople: city of the world's desire (1995), 211