The phrase "the sick man of Europe" was initially created to refer to which of these struggling empires?

Another sick man of Russia is scaring the rest of the world

Famous political cartoon shows the personified Britain, France, and Russia standing beside the death bed of the Ottoman Empire trying to decide what to do. The death and breakup of the Ottoman Empire at the end of World War I destabilized that part of the world, and the dust has not yet settled.