sentences:  In 1937, on a modest grant from a patron of the British Museum, he travelled to Egypt and Istanbul, further widening his perspective on late antique and early medieval art as an "international" phenomenon.It was this perspective that he brought to his first book, "Early Medieval Art in the British Museum" (1940).Ostensibly a guidebook, this was in fact an attempt to trace the transformation of classical art into medieval, a subject which Kitzinger would revisit on many occasions throughout his career.