The Royal Oak is the third most common pub name in Britain

Oak Apple Day was declared a public holiday by parliament, and its official celebration continued until 1859. The date is still celebrated as Founder's Day at the Royal Hospital Chelsea. 

The Royal Oak is the third most common pub name in Britain. Since the Restoration there have been at last eight warships called HMS Royal Oak.

J. Lewis-Stempel, The glorious life of the oak (2018), 27

Charles came to define his royal authority through the awe and silence induced by painting

Charles came to define his royal authority through the awe and silence induced by painting, rather than the books and public disputation cherished by his father, Charles lacked the scholarly erudition of his father, James I, and the ruthless pragmatism of his son, Charles II. His close attention to detail and tendency towards prevarication made him particularly susceptible to the pleasures of collecting, with its absorption in questions of provenance, attribution, style and judgement.

J. Brotton, The sale of the late King's goods (2006), 10