Xu Guangqi Autograph Profile by RACC
- Home /
- Xu Guangqi
Xu Guangqi or Hsü Kuang-ch'i (April 24, 1562 – November 8, 1633), also known by his baptismal name Paul, was a Chinese agronomist, astronomer, mathematician, politician, and writer during the Ming dynasty. Xu was appointed by the Chinese Emperor in 1629 to be the leader of the ShiXian calendar reform, which he embarked on with the assistance of Jesuits. Xu was a colleague and collaborator of the Italian Jesuits Matteo Ricci and Sabatino de Ursis and assisted their translation of several classic Western texts into Chinese, including part of Euclid's Elements. He was also the author o… Read more of Biography...
Authentic signed releases — the moment they drop
Drops are brand-new, in-stock autographed items posted by the RACC community as soon as a verified retailer releases them. No bidding, no waiting — buy directly from the source before they sell out.
More recent drops on RACC
![David Duchovny [SIGNED] (Standard Black) Prince of Pieces 2xLP](/media/signed_drops/1000021822.png)
Real Autograph Collectors Club (RACC)
The #1 Facebook Group & fan community for Celebrity & Music Autographs. Learn What's Real, Get Collecting Tips, Make Friends, and Buy from RACC Trusted Sellers!
Popular Celebrity Autograph Profiles This Week
About RACC
The Real Autograph Collectors Club (RACC) is an online community of in person autograph collectors, fans, and sellers (with 20,000+ members in over 100 countries) who have collectively obtained over 1 million signatures. The group can be joined through Facebook at Real Autograph Collectors Club (RACC) and also maintains a RACC Trusted Sellers list of the world's top most reputable celebrity autograph and signed music memorabilia dealers. RACC members offer authenticity opinions, discussions, in person autograph stories, live streaming, POV videos of autograph encounters, signing habits, buy and sell threads, collecting tips, fanmail (TTM) addresses, and many other resources on the community's growing Facebook group.
- 1 RACC
- 20,000+ worldwide members (collectors & fans like you!)
- 162 RACC Trusted Sellers
- 1 million+ celebity autographs obtained
RACC is
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
© 2026 Real Autograph Collectors Club
