Marcus Martiannius Pulcher was a governor of Britannia Superior

Britannia Superior

Britannia Superior was one of the provinces of Roman Britain created around 197 AD by Emperor Septimus Severus immediately after winning a civil war against Clodius Albinus, a war fought to determine who would be the next emperor. Albinus was the governor of Britannia during that civil war...

, a province of Roman Britain

Roman Britain

Roman Britain was the part of the island of Great Britain controlled by the Roman Empire from AD 43 until ca. AD 410.The Romans referred to the imperial province as Britannia, which eventually comprised all of the island of Great Britain south of the fluid frontier with Caledonia...

 probably some time during the third century AD.

The only evidence of his work is an inscription which was found in 1975, re-used as part of the fourth century riverside defences in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

. It states that he repaired the temple of Isis

Isis

Isis or in original more likely Aset is a goddess in Ancient Egyptian religious beliefs, whose worship spread throughout the Greco-Roman world. She was worshipped as the ideal mother and wife as well as the matron of nature and magic...

which had collapsed through old age. Peter Salway infers from this that his rule was relatively peaceful as he was able to undertake restoration work in the city.