Heraldry in a West-European sense, permanent motifs transmitted through hereditary right, was never adopted in the Byzantine Empire.
During the last few centuries of the empire's existence, a double-headed eagle symbol was increasingly associated with imperial power, with senior members of the Palaiologos dynasty typically using it as a personal symbol.
The only preserved illustration of a coat of arms of the Paleologi of Pesaro is the depiction of one on the tombstone of Theodore Paleologus in Landulph, Cornwall.
Theodore's coat of arms prominently displays a double-headed eagle, harkening back to the old emperors, but also incorporates two towers, the meaning of which is unknown.
John Hall believes the towers to represent the gates of Rome and Constantinople.
Above the double-headed eagle is an imperial crown.

The arms on the tombstone also features a small crescent at the bottom.
In English heraldry, such a crescent denotes someone as a second son, meaning that it is possible that Theodore had an older brother, but no older son of Camilio Paleologus is known.
It is possible that the crescent was mistakenly added by Nicholas Lower, who commissioned the tombstone after Theodore's death.

The shield on the tombstone is divided into two sections by a line behind the double-headed eagle, which indicates that it would have had two background colors.
Since the tombstone itself is colorless, what these colors were is unknown.
Hall believes that the colors may have been red and white, since these colors were prominently used by the Palaiologoi emperors.
Heraldry in a West-European sense, permanent motifs transmitted through hereditary right, was never adopted in the Byzantine Empire. During the last few centuries of the empire's existence, a double-headed eagle symbol was increasingly associated with imperial power, with senior members of the Palaiologos dynasty typically using it as a personal symbol. The only preserved illustration of a coat of arms of the Paleologi of Pesaro is the depiction of one on the tombstone of Theodore Paleologus in Landulph, Cornwall. Theodore's coat of arms prominently displays a double-headed eagle, harkening back to the old emperors, but also incorporates two towers, the meaning of which is unknown. John Hall believes the towers to represent the gates of Rome and Constantinople. Above the double-headed eagle is an imperial crown.
The arms on the tombstone also features a small crescent at the bottom. In English heraldry, such a crescent denotes someone as a second son, meaning that it is possible that Theodore had an older brother, but no older son of Camilio Paleologus is known. It is possible that the crescent was mistakenly added by Nicholas Lower, who commissioned the tombstone after Theodore's death.
The shield on the tombstone is divided into two sections by a line behind the double-headed eagle, which indicates that it would have had two background colors. Since the tombstone itself is colorless, what these colors were is unknown. Hall believes that the colors may have been red and white, since these colors were prominently used by the Palaiologoi emperors.
Paleologus of Pesaro