It looks like a fairly ordinary moderately old building next to a dirty noisy main road - but this old building is older than you could ever imagine. It's actually thought to be the oldest brick built building in London - and over 500 years old.
Hidden behind high walls near the Barbican can be found the last surviving Tudor Great Chamber in London, within the Charterhouse estate.
A map of London, as it was during the era of the Tudor monarchs, give or take a few decades has been released by Layers of London.
The team working on restoring the ceiling of Greenwich's painted hall, have found something in the basement -- remains of Greenwich's Tudor palace.
There a small, but interesting exhibition at the moment that puts on display a range of Tudor era paintings, books and royal documents.