UNIVERSITÄTS- UND STADTBIBLIOTHEK (USB) KÖLN.

The article focuses on the valuable library of Jakob Ignaz Hittorff, a 19th century architect and scientist, owned by the University and City Library (USB) Cologne, and the efforts to physically reconstruct and catalog the collection for future research. It mentions about library efforts correcting and supplemeting catalog data, recording provenances, publishing inventories from the USB's own holdings, recruiting an art historian as head of the Hittorff research center.