From their website:
We have added two new packs to our Mediterranean Range of Spanish style buildings. The first one is an expansion pack for our walls. This consists of a gateway flanked by pillars and three tumbled down sections.
The tumbled down sections are a random selection from six different designs, three with pillars and three without. All six variants can be viewed on the Mediterranean Range catalogue page.
The second addition is a gatehouse. This is designed to be used with our walls, and is the same length as a long straight wall section.