The superimposed layer, which is sculptured, is generally opaque white.
These Christian communities, disguised under the legally authorized name of burial societies, gradually formed a vast secret cosmopolitan association, superimposed upon Roman society but incompatible with the Empire.
This last was rebuilt and enlarged in 1843-1844, but preserves the three bays of the Saxon church, with its western narthex, on which was superimposed the Norman tower, which presents its rich front to the street.
Geologically, Armenia consists of archaic rocks upon which, towards the north, are superimposed Palaeozoic, and towards the south later sedimentary rocks.
In 1868-1872 another aqueduct, still longer, was superimposed above that of the i 7th century, forming part of the system conveying water from the river Vanne to Paris.