Pied-droit is a square Pillar, which is in part within the Wall.
Pillaster is the same, with this Difference; that the Pillaster has a Base and a Capital, as a Pillar hath, which the Pied-droit has not.
Platt-band is a square Member, which terminates the Architrave of the Dorick Order, and passes immediately under the Triglyphs.
Plinthus signifies a Brick or square Tile. It’s in Architecture taken for that square Member which makes the Foundation of the Base of the Pillar.
Posticum is the back Gate of a Fabrick.
Portico is a long place covered with a Floor or Flatfond, supported by Pillars.
Proscenium, from πρὸ and σκενινὴ tentorium; it signifies the forepart of the Scene; it was an Edifice as high as the last Portico of the Theatre, whose Face or Front was adorned with many Ranges of Pillars.
Prostyle from πρὸ and στὺλος, signifies that which has Pillars before only. This was one sort of the Temples of the Ancients.
Pseudodiptere, ψευδής mendax, δὶς bis, and πτὲρον ala; signifies a false Diptere. This was a kind of a Temple among the Ancients, which had Porticoes round about, which were every one as large as the double Portico of the Diptere.
Pseudoperiptere, from ψευδὴς mendax, and περὶ, and πτερὸν ala, was a sort of a Temple, where the Side-Pillars were part in the Wall of the inner side of the Temple, which was enlarged sufficiently to enclose within the space which was allowed the Porticoes of the Periptere.