The Comacines also used frescoes in Theodolinda's palace at Monza in the fifth and sixth centuries. From the foregoing description of Hexham church by Eddius Stephanus, it would appear that there were galleries over the aisles to which access was gained by spiral stairways in the wall. Similar galleries and spiral stairway still exist in the church of S. Agnese in Rome. In this church between the nave and the aisles there is a double arcade of open arches one above the other; the higher arcade on each side forms the front of the galleries--above these is a clerestory. The church of S. Lorenzo at Verona, also a Comacine church, contains a spiral stairway in the wall which led to the different divisions in the women's gallery for the widows, matrons, and girls. So far I have not heard of any ancient spiral stairways as still existing in any other than in these Comacine churches.[116] [Illustration: TOWER OF S. APOLLINARE NUOVO, RAVENNA. _To face page 153._] These galleries and arcades may be regarded as the original of the triforium. Eddius relates that there were also bell-towers at Hexham of surprising height, and this suggests reflections. Hexham was built about A.D. 674, early in the Saxon period, and these tall towers were built wholly at that time. What were they like? The early Comacine towers were built in several stages; the lowest generally had either no windows or slits; the next stage above had single-light windows, plain round-headed and straight-sided, as if cut out of the wall; in the stages above the windows were of two or three lights divided by colonnettes, the larger number of lights being in the windows of the upper stages; in each stage there were commonly four windows, one opening to each quarter of the compass. Wolstan's description of the tower of Winchester answers very nearly to this. He says it consisted of five storeys; in each were four windows looking towards the four cardinal points, which were illuminated every night.