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Appearance and iconography

Einhard gives a first-hand description of Charlemagne's appearance later in life:

He was heavily built, sturdy, and of considerable stature, although not exceptionally so, since his height was seven times the length of his own foot. He had a round head, large and lively eyes, a slightly larger nose than usual, white but still attractive hair, a bright and cheerful expression, a short and fat neck, and he enjoyed good health, except for the fevers that affected him in the last few years of his life.

Charlemagne's tomb was opened in 1861 by scientists who reconstructed his skeleton and measured it at 1.92 metres (6 ft 4 in) in length, roughly equivalent to Einhard's seven feet. A 2010 estimate of his height from an X-ray and CT scan of his tibia was 1.84 metres (6 ft 0 in); this puts him in the 99th percentile of height for his period, given that average male height of his time was 1.69 metres (5 ft 7 in). The width of the bone suggested that he was slim.

Charlemagne wore his hair short, abandoning the Merovingian tradition of long-haired monarchs. He had a moustache (possibly imitating the Ostrogothic king Theoderic the Great), in contrast with the bearded Merovingian kings; future Carolingian monarchs would adopt this style. Paul Dutton notes the ubiquitous crown in portraits of Charlemagne and other Carolingian rulers, replacing the earlier Merovingian long hair. A ninth-century statuette depicts Charlemagne or his grandson, Charles the Bald and shows the subject as moustachioed with short hair; this also appears on contemporary coinage.

By the twelfth century, Charlemagne was described as bearded rather than moustachioed in literary sources such as the Song of Roland, the Pseudo-Turpin Chronicle, and other works in Latin, French, and German. The Pseudo-Turpin uniquely says that his hair was brown. Later art and iconography of Charlemagne followed suit, generally depicting him in a later medieval style as bearded with longer hair.