The governor's palace and old large forum seem to have fallen out of use around 300, but in general the first half of the 4th century appears to have been a prosperous time for Britain, for the villa estates surrounding London appear to have flourished during this period. The London Mithraeum was rededicated, probably to Bacchus. A list of the 16 "archbishops" of London was recorded by Jocelyne of Furness in the 12th century, claiming the city's Christian community was founded in the 2nd century under the legendary King Lucius and his missionary saints Fagan, Deruvian, Elvanus, and Medwin. None of that is considered credible by modern historians but, although the surviving text is problematic, either Bishop Restitutus or Adelphius at the 314 Council of Arles seems to have come from Londinium. The location of Londinium's original cathedral is uncertain. The present structure of St Peter upon Cornhill was designed by Christopher Wren following the Great Fire in 1666 but it stands upon the highest point in the area of old Londinium and medieval legends tied it to the city's earliest Christian community. In 1995, however, a large and ornate 4th-century building on Tower Hill was discovered: built sometime between 350 and 400, it seems to have mimicked St Ambrose's cathedral in the imperial capital at Milan on a still-larger scale. It was about long by about wide. Excavations by David Sankey of MOLAS established it was constructed out of stone taken from other buildings, including a veneer of black marble. It was probably dedicated to St Paul.