First, this is Lincoln Castle which was also built for William the Conqueror (kinda like a northern headquarters) while he fought in the north of England, and has existed until present day as a prison and law court. It also houses a museum. It would appear that there is reconstruction at present.
Lincoln Cathedral is also called St Mary's Cathedral, or the church of St Mary Magdalene of Lincoln. It was almost destroyed by an earthquake in 1185. After the earthquake, a new bishop was installed, St Hugh de Burgundy of Avalon, France and did most of the rebuilding. He died in 1200. Reconstruction continued and was pretty much done by 1235AD. The Central Tower was added and made the structure the tallest structure in the world until 1549 when the spire blew down and was never replaced. This photo is taken from the same spot as the castle shot, just do an about face and you're at the entrance to the cathedral.
You can get the idea of it's size by the little lady in the red sweatshirt standing on the grass at the far front.)
What you can't appreciate looking down the aisle is the stained glass!! It also is amazing, and the windows above are very artful as well.
and right across from them is this shopping area built in the 1500s replacing a chapel from 1265 dedicated to Thomas Becket (for you history fans), making this the oldest bridge in England with a structure on it. (Also notice the greenery on the roof.... there is moss or vines growing on EVERYTHING ... all that moisture you know!!)