seem to be the most frequent. Their presence is generally associated with the
evolution of the characteristics of defensive structures consequent on the use
of fire arms; however, even older towers like Riccia, Colletorto, S.Croce di
Magliano or Roccapipirozzi are not unusual. The construction technique is
characterised, in most cases, by the use of mixed stone elements laid in rows
that were made level and regular through the use of large quantities of mortar.
Semicircular floor-plans were normally adopted in the construction of corner or
curtain towers (often escarped) which were frequent features of almost all the
settlements of the Aragonese period.