Genealogical history of the Portuguese Royal House (1735-1749) D. António Caetano de Sousa (1674-1759), religious Theatine, historian, bibliographer and genealogist, was a renowned member of the Royal Academy of Portuguese History. His main work, the Genealogical History, can be considered a general history of the Kingdom, as varied are the information it contains. The Provas (Proofs) also present undeniable interest, since, they transcribe documents that are missing. The copy matches exactly with the description of Inocêncio Francisco da Silva, in his Bibliographical Dictionary, namely: the first 12 volumes of history are bound in 13 (volume XII consists of two parts); the following are the Index and the six ones of Provas. The entire calf bindings of the time retain the original guards but they are not all exactly the same. Bindings a little fatigued, especially those of the three first volumes of history, showing some traces of bookworm, including the first and last leaves, next to the fold and the guards. Volume IX of the History with some stains on the upper margin of the first 10 leaves.