and patterned in parts, with extensive tapestries adding colour. Sculptural decoration was added, mainly ornaments, as it became more fashionable in the 12th century—especially after the Gothic style arrived in England around 1170. In the current structure the original Norman arches survive principally under the central tower and on the north side of the nave. The arches in the rest of the building are Gothic, following medieval rebuilding and extensions, and Victorian era restoration. The Abbey was extended in the 1190s by Abbot John de Cella (also known as John of Wallingford) (1195–1214); as the number of monks grew from fifty to over a hundred, the Abbey church was extended westwards with three bays added to the nave. The severe Norman west front was also rebuilt by Hugh de Goldclif—although how is uncertain; it was very costly but its 'rapid' weathering and later alterations have erased all but fragments. A more prominent shrine and altar to Saint Amphibalus were also added. The work was very slow under de Cella and was not completed until the time of Abbot William de Trumpington (1214–1235). The low Norman tower roof was demolished and a new, much higher, broached spire was raised, sheathed in lead. The St Albans Psalter (ca. 1130–1145) is the best known of a number of important Romanesque illuminated manuscripts produced in the Abbey scriptorium. Later, Matthew Paris, a monk at St Albans from 1217 until his death in 1259, was important both as a chronicler and an artist. Eighteen of his manuscripts survive and are a rich source of contemporary information for historians. Nicholas Breakspear was born near St Albans and applied to be admitted to the Abbey as a novice, but he was turned down. He eventually managed to be accepted into an abbey in France. In 1154 he was elected Pope Adrian IV, the only English Pope there has ever been. The head of the Abbey was confirmed as the premier abbot in England also in 1154. The Abbey had a number of daughter houses, ranging from Tynemouth Priory in the north to Binham Priory near the Norfolk coast. 13th to 15th centuries An earthquake shook the Abbey in 1250 and damaged the eastern end of the church. In 1257 the dangerously cracked sections were knocked down — three apses and two bays. The thick Presbytery wall supporting the tower was left. The rebuilding and updating was completed