In 19th Century and early 20th France and Belgium, a number of designs for multi-chamber revolvers appeared.
"The Henrion, Dassy & Heuschen Revolver (HDH Revolver) was a 20 shot revolver manufactured by the French firm of Henrion, Dassy & Heuschen (HDH) from 1911 to 1928. It was marketed under a variety of names that were supposed to denote power and masculinity. Names such as "Wild West", "Terrible", "Redoubtable", or even "Machine-gun HDH" certainly have a get-down-to-business ring to them."
Some of these were termed "barricade guns." The ones I've seen had multiple ranked cylinders, but single barrels. One recalls the LeMat, a .44 or .36 caliber revolver with more than 6 chambers and a separate 16 ga. shotgun barrel underneath.
I believe these largely unsuccessful designs were an attempt by revolver manufacturers to surpass the capabilitiies of early semi-automtic pistols, like the Borchardt, Mauser, and Luger.
Then out spoke brave Horatius, the Captain of the Gate: "To every man upon this earth, death cometh soon or late; And how can man die better than facing fearful odds, For the ashes of his fathers, and the temples of his Gods,"
"Well, John Henry said to the Cap'n, "A man ain't nuthin' but a man. But, before I let that steam drill beat me, gonna die with my hammer in my hand, Lawd, Lawd, gonna die with my hammer in my hand."