The author is deeply grateful for the facilities afforded him in the prosecution of his investigations while he was a resident in Palestrina, and he takes great pleasure in thanking for their courtesies, Cav. Capitano Felice Cicerchia, President of the Archaeological Society at Palestrina, his brother, Cav. Emilio Cicerchia, Government Inspector of Antiquities, Professor Pompeo Bernardini, Mayor of the City, and Cav. Francesco Coltellacci, Municipal Secretary. Finally, he desires to express his cordial appreciation of the kind advice and generous assistance given by Professor John Martin Vincent in connection with the publication of this monograph. A STUDY OF THE TOPOGRAPHY AND MUNICIPAL HISTORY OF PRAENESTE. CHAPTER I. THE TOPOGRAPHY OF PRAENESTE. Nearly a half mile out from the rugged Sabine mountains, standing clear from them, and directly in front of the sinuous little valley which the northernmost headstream of the Trerus made for itself, rises a conspicuous and commanding mountain, two thousand three hundred and eighteen feet above the level of the sea, and something more than half that height above the plain below. This limestone mountain, the modern Monte Glicestro, presents on the north a precipitous and unapproachable side to the Sabines, but turns a fairer face to the southern and western plain. From its conical summit the mountain stretches steeply down toward the southwest, dividing almost at once into two rounded slopes, one of which, the Colle di S. Martino, faces nearly west, the other in a direction a little west of south. On this latter slope is situated the modern Palestrina, which is built on the site of the ancient Praeneste.