I think the standard source is The Receyt of the Ladie Kateryne, which details the pageants and other festivities prepared for the wedding. An edition was published in the 1990s, edited by Gordon Kipling. It's written in period English, so you might prefer the detailed descriptions provided in David Starkey's Six Wives.
Julia Fox's new book on Catherine of Aragon and her sister Juana, Sister Queens, contains some very interesting descriptions of the pageants presented for Arthur's wedding. Her notes for that chapter cite The Receyt, Mattingly's classic Catherine of Aragon, Sydney Anglo's standard reference work Spectacle, Pageantry and Early Tudor Policy, the Great Chronicle of London (1893) and Chronicles of London (1905), as well as Starkey's works.
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