List of imported elements?

Where in Rhino can I find a list of imported elements objects etc. e.g., I imported a moulding profile that I used to extrude but deleted the curve. Does Rhino retain the block import information (like AC) even if the block has been removed? If so where can I find it?

If they haven’t been purged out, defined blocks can be found in the BlockManager, or in the drop down menu in the Insert command.