In 1994 the historian Dan Cruickshank discovered 4,000 tons, or about 60%, of the arch's stones buried in the bed of the River Lea in the East End of London, including the architrave stones with the gilded EUSTON lettering.
The main portal has an architrave with bas-reliefs commissioned by abbot Guillaume and realized in 1019-1020 in white marble from Céret.
In the middle of the architrave is Niccolò degli Arcioni's coat of arms, between those of Atri and Teramo.