The street contains two of the City churches designed by Sir Christopher Wren: St. Michael, Cornhill, on the site of the Roman forum of Londinium, and St Peter upon Cornhill, reputed to occupy the oldest Christianised site in London.
The Christianisation of the population was mainly the work of missionaries like Amandus (St. Bavo's Abbey and St. Peter's Abbey in Ghent) and Eligius (coastal region and Antwerp).
Their real Christianisation took place, alongside the ecclesiastical organisation of their territory, during the early and mid 8th century under Boniface, who felled their "sacred oak" at Geismar in 724, abolishing the vestiges of their paganism.
It is suggested that the refurbishment of the ‘temple’ building D2a (re-built in the same position as D2b) was a Christianisation as recommended by Pope Gregory I (see Bede's Ecclesiastical History, Book 1 Chapter 30).