On 4 May 1942, an early morning air raid took place over Exeter. The cathedral sustained a direct hit by a large high-explosive bomb on the chapel of St James, completely demolishing it. The muniment room above, three bays of the aisle and two flying buttresses were also destroyed in the blast. The medieval wooden screen opposite the chapel was smashed into many pieces by the blast, but it has been reconstructed and restored. Fortunately many of the cathedral's most important artifacts, such as the glass of the great east window, the misericords, the Exeter Book, the bishop's throne and the Bronescombe Effigy, had been removed at the start of the war in anticipation of such an attack. Subsequent repairs and the clearance of the area around the western end of the building uncovered portions of earlier structures, including remains of the Roman city and of the original Norman cathedral.