1623

Deaths 
February 8 – Thomas Cecil, 1st Earl of Exeter, English politician (b. 1546)
March 19 – Uesugi Kagekatsu, Japanese samurai and warlord (b. 1556)
June 16 – Christian, Duke of Brunswick-Lüneburg-Wolfenbüttel, German Protestant military leader (b. 1599)
July 4 – William Byrd, English composer
July 8 – Pope Gregory XV (b. 1554)
October 21 – William Waad, English statesman and diplomat (b. 1546)
November 9 – William Camden, English historian (b. 1551)
November 11 – Philippe de Mornay, French writer (b. 1549)
November 12 – Josaphat Kuncevyc, Lithuanian archbishop
Andrea Andreani, Italian engraver (b. 1540)