The oldest sections of the original houses were lost during renovations in 1633 and 1655.
The section devoted to the important architecture and design collection is all but lost.
Other sections became so thoroughly lost they have only been precisely identified with the development of aerial photography.
"It is clear that a section of our epic was lost."
Within and underneath functioning cities, sections have been lost or left to decay.
But the genealogical section of the plates was lost.
The stone itself is broken, and parts have been found scattered around the city of Rome, although some sections remain lost.
With a collection of books said to be about 290,000, the entire adult section was lost, as was the reference section.
A section of the wall, some 46 yards, long was lost and replaced with a wall.
Other behaviors include itching ears so severely, that large sections are lost.