Titus Groan first catalyst is the birth of Titus Groan, the heir to Lord Sepulchrave, which interrupts the centuries-old daily rituals which are practiced at all levels of the castle's society, from the kitchens to the Hall of Bright Carvings in Gormenghast's upper reaches. Though he is the title character and integral to the plot, Titus appears only infrequently as an infant during his first two years of life. The second is Steerpike, a ruthlessly ambitious kitchen boy, whose rise drives the plot of "Titus Groan". His escape from the kitchen during the castle celebration of Lord Titus' birth introduces change into
Gormenghast (castle) to school. Occupied by the same family for five hundred years, Knole's sprawling layout and varied architecture, added to and modified by successive generations, bear comparison with Gormenghast. (Some of the descriptions of Knole by Vita Sackville-West are also remarkably similar to passages by Peake.) Its massive walls evoke the great Norman castles and keeps of medieval Europe, such as the walled city of Carcassonne (pictured), Rochester Castle in England or Caernarfon Castle in Wales; while the ancient walled Chinese cities of Beijing and Tientsin where Mervyn Peake spent his childhood are a major influence. Another Chinese source may be