Millions of viewers are hooked on its period detail that transports them to a gentler age.
But it would appear that while the makers of Downton Abbey have captured the spirit of the early part of last century they may have taken their eye of the finer details.
Despite enthusiastic praise for the storylines and acting on the series, which has pulled in more than eight million viewers and revived ITV's drama output, a series of apparent glaring historical errors has sparked criticism from some fans.
Good reception: In an oversight by producers, a television aerial appeared in one episode of period drama Downton Abbey, which is set in 1912, a number of years before television was invented
The mistakes, which have mainly been spotted in exterior shots, mostly in the Oxfordshire village of Bampton, include a TV aerial fixed to a house, a modern-style conservatory and double yellow lines on a road, which have all appeared on screen.
Some viewers say they have also seen a modern street sign in the background and claim that a piece of music featured in one of the episodes had not yet been composed when the drama is set in 1912.