Nawab Kalbe Ali Khan Khan ( 1865-1887) evinced keen interest in the collection of   rare manuscripts, paintings and specimens of Islamic Calligraphy.

He was himself an eminent scholar and poet. He commisioned scholars to secure rare manuscripts, paintings and art pieces of the Mughal and Awadh Libraries. He used to examine the manuscripts and recorded his impression about their importance. The Nawab aslo went o Haji pilgrimage and brought a good number of rare manuscipts including the unique parchment manuscript of Quran attributed to Hazrat Ali (d 661) of the 7th century AD with him. Thus the Library collection was enriched enormously.

Nawab Mushtaq Ali Khan ( 1887-1889) was permanently sick. General Azamuddin Khan was appointed the Regent to look after the affairs of the State in 1887. He constituted a managing committee and allotted a budget for the upkeep and development of the library. A new building was also constructed where the Library collection was shifted from Tosha Khana in 1892. He also extended facilities to senior academicians and research scholars from other parts of the country.

Nawab Hamid Ali Khan ( 1889-1930) visited several countries before ascending to the throne. He was highly educated and a prolific builder and built impressive palaces, castle ramparts, and state building in Rampur city. He also built a splended mansion of Indo-European style named Hamid Manzil inside the fort in 1904. The Raza Library was later shifted to this magnificent building in 1957. Nawab Hamid Ali Khan added new items to the valuable collection and enforced certain reforms in the management of the library. During his time, Hakim Ajmal Khan, Maulana Najmul Ghani Khan and Hafiz Ahmad Ali Khan 'Shauq' managed the Library.

Nawab Raza Ali Khan ascended the throne on 21st June 1930. He had his education in India and abroad. He showed a very progressive bent from his early age and introduced modern educatiuon in schools and colleges. He also invited educationists of repute to organize these academic institutions. Besides he was a great lover of Indian music for which he purchased several rare manuscripts and books on the subject.