Let 'P' be the underlying principal homogeneous space of 'G'.

It is the principal historic public space of the city.

The specific spaces are, (for groups, the principal homogeneous space is also listed):

The principal space is a large room subdivided at the Paca Street end into offices.

The sanctuary is the principal interior space of the building.

The principal living spaces are concentrated in the center two story portion of the house where the reception, living and dining areas open into each other.

The car had become a principal living space as well as a means of transportation.

Since the dawn of civilization, streets have been the principal public space of every community.

At the northeast corner of the building is the entrance lobby principal public space of the original building.

The principal spaces are richly designed, and survive virtually unaltered.