Kilkenny Castle has been an important site since Richard de Clare, 2nd Earl of Pembroke, commonly known as
Strongbow constructed the first castle, probably a wooden structure, in the 12th century. The Anglo-Normans had established a castle in 1173, possibly on the site of an earlier residence of the Mac Giolla Phádraig kings of Osraighe. Kilkenny formed part of the lordship of Leinster, which was granted to Strongbow. Strongbow’s daughter and heiress, Isabel married William Marshall in 1189. The Earl Marshall owned large estates in Ireland, England, Wales and France and managed them effectively. He appointed Geoffrey fitz Robert as seneschal of Leinster and so began a major phase of development in Kilkenny, including the construction of Kilkenny Castle and the agreement of rents and privileges with burgesses or citizens of the borough. The first stone castle on the site, was completed in 1213. This was a square-shaped castle with towers at each corner; three of these original four towers survive to this day