Its first prominent appearance in English history may be dated in the year 633, when the Mercian prince Penda joined the Welsh king Ceadwalla in overthrowing Edwin.
The controversy began with an address which Leo the Isaurian, in the tenth year of his reign (726), delivered in public "in favour of overthrowing the holy and venerable images," as says Theophanes (Chronogr., in Migne Patr.
Yet he became, in the skilful hands of Gilbert and Maelmaedoc O'Morgair, the instrument of overthrowing the hereditary succession to the primatial see.
The success of the Jacobins in overthrowing the monarchy had ended their union.
Several times they succeeded in overthrowing the Chinese rule - in 1825, in 1830 and in 1847 - but their successes were never permanent.