l Oldest part dates to 1099;

l Oldest part dates to 1099;

l Is a Grade I listed building;

l Has more than one million visitors a year;

l Covers eight acres;

l Has 1100 rooms;

l Has 100 staircases;

l Has two miles of passageways;

l Has 3000 windows;

l Main part is 160 years old;

l Has 250 miles of electric and 200 miles of IT cabling;

l Has 800 ventilation units and radiators;

l Has 7000 fire detection units;

l Contains a wealth of art work, archives and historic furnishings;

l Has 1500 fire extinguishers;

l Has 100 electric boards;

l Is a Unesco World heritage site;

l Has 13 miles of pipes;

l Has one mile of underground corridors.