The chief Roman contributions to architecture were the arch and the dome.

Their chief contribution to its history has been the loss of the United States.

His chief contributions to anthropology include this view that seeing and representing the visual is as important as speaking or writing words.

His chief contributions are in the area of X-Ray crystallography.

His chief contribution to theological literature is an exposition of the Apocalypse.

His chief contribution was given to the magnificent hall, the constructures on the third floor.

Dinostratus' chief contribution to mathematics was his solution to the problem of squaring the circle.

His chief contribution, however, was promoting the Morris Canal, for which he invoked nature as a justification.

My chief contribution was to stand behind him, occasionally say things like "Is it true that electricity can shock you?

His chief contribution to public choice theory was the budget-maximizing model - the notion that bureaucrats will attempt to maximize their agency's budget and authority.