The Doctor: This painting doesn't belong here - not in this time or place.
Clara Oswald: Obviously.
The Doctor: It's the fall of Arcadia, Gallifrey's second city.
Clara Oswald: But how is it doing that? How is that possible? [She walks up to the painting and puts a hand out to touch it.] It's an oil painting...in 3D.
The Doctor: Time Lord art. Bigger on the inside. A slice of real time... frozen.
Screencapped from Doctor Who's 50th Anniversary Episode 'The Day Of The Doctor'
People disagree. Some say Gallifrey Falls, or No More
The Doctor: Which title? There's two... "No More", or "Gallifrey Falls"?
The Curator: No, you see that's where everybody is wrong... it's all ONE title. "Gallifrey Falls No More". Now what do you think that means, eh?
The Curator: Where is it indeed? Lost - shh! - perhaps. Things do get lost, you know. Now you must excuse me. Oh...you have a lot to do.
The Eleventh Doctor: Do I?
The Curator: Mm.
The Eleventh Doctor: Is that what I'm supposed to do now? Go looking for Gallifrey?
The Curator: Oh, it's entirely up to you. Your choice. I can only tell you what I would do, if I were you...Oh! If I were you...Perhaps I WAS you, of course. Or perhaps... you are me.
The Eleventh Doctor: Yeah!
The Curator: Congratulations.
The Eleventh Doctor: Thank you very much.
The Curator: Or perhaps it doesn't matter either way. Who knows? Who...knows?
(Sorry, couldn't resist jumping to the end. This was my favourite scene from the 50th anniversary special)
Oh, for God's sake...GALLIFREY STANDS!!