principal part

De Rossi has prepared a map of the principal part of it, divided into fifteen rectilinear and generally rectangular areas.

Treatises on the evidences of Christianity constitute a principal part of the theological literature of the eighteenth century.

The first twenty years of the period include also a principal part of the history of the Nonjurors.

This panel is, of course, the principal part of the altar-piece.

The old mud-choked riverbed separates it just at that spot from the principal part.