Introduction.—The systematic exploration of Ptolemais (modern Tolmeita), in Cyrenaica, began in 1935 under the auspices of the Italian Government, and under the direction of the first-named writer. The general programme of excavation took into consideration not only the important Hellenistic period, which gave the city its name and saw its first development as an autonomous trading-centre, but also the late-Roman age when, upon Diocletian's reforms, Ptolemais became capital of the new province of Libya Pentapolis and a Metropolitan See, later occupied by Bishop Synesius.As one of several starting-points for the study of this later period, there was selected the area first noted by the Beecheys as containing ‘heaps of columns’, which later yielded the monumental inscriptions of Valentinian, Arcadius, and Honorius, published by Oliverio. Here excavation soon brought to light a decumanus, running from the major cardo on the west towards the great Byzantine fortress on the east. Architectural and other discoveries made in 1935–36 justified the provisional title ‘Monumental Street’ assigned to this ancient thoroughfare. In terms of the general town-plan, which is extremely regular, this street may be called ‘Decumanus II North’, since two rows of long rectangular insulae separate it from the Decumanus Maximus leading to the West Gate, still erect. The clearing of the Monumental Street and its frontages revealed the well-known Maenad reliefs, attributed to the sculptor Callimachus, a late-Roman triple Triumphal Arch, and fragments of monumental inscriptions similar in character to those previously published from the same area.
