Emperor Hadrian visited in 122. The impressive public buildings from around this period may have been initially constructed in preparation for his visit or during the rebuilding that followed the "Hadrianic Fire". The so-called 'Hadrianic Fire' is not mentioned in any historical sources but has been inferred by evidence of large-scale burning identified by archaeologists on a number of excavation sites around the City of London. The best dating evidence for this event(s) comes from burnt stocks of unsold Terra Sigilatta pottery, which can be dated to "circa" AD 120-125. These were found in destroyed warehouse or shop buildings at Regis House and Bucklersbury. Hadrianic fire horizons tend to be dated to around the AD 120-130s but it is difficult to prove that they are precisely contemporary and there remains some uncertainty as to whether they indicate a single large fire or a series of smaller conflagrations. Fire destroyed substantial areas of the city in the area north of the Thames but does not seem to have damaged many major public buildings. There is very little evidence to suggest similar burning in the adjacent Southwark settlement. The Hadrianic fire (or fires) has normally been assumed to be accidental but it has also been suggested that it could relate to an episode of political turbulence.