In the middle of the building is a six-storey glass tower containing the King 's Library , with 65,000 printed volumes along with other pamphlets , manuscripts and maps collected by King George III between 1763 and 1820 .
In the middle of the building is a four-storey glass tower containing the '' King 's Library '' , with 65,000 printed volumes along with other pamphlets , manuscripts and maps collected by King George III between 1763 and 1820 .