Well if he did leave it it still doesn't collide with the EU. I doubt he would let all the Jedi Archives and Artifacts be, so he removed and/or destroyed it. When we see it in RotJ it is only the same building, not the same inside. That's how I like to see it, and no one might even know what it was before the Empire.
Maybe he left it standing as a reminder to the people that he is supreme. If he can take out the jedi, imagine what he can do to everyone else.
Plus, it was one hell of a building. Maybe he uses it for a command center? or training station for new troopers or something
__________________ As the cries penetrate stillair, this day we celebrate.
The wait now ends.
From four corners smoke plumes into a reddened sky.
In the face of lantern light, Tonight my destiny lies.
This day so hallowed, from here to forever its will I will follow.
Tonight will come to life.
Deadened branches stirred by the whispers in the wind.
Fall Children fill the streets at dusk, at last, it all will begin...
Perhaps he was actually thinking financially?
Why tear apart a perfectly fine building which can be used for many things and build a new one instead? So by keeping i there and removing the inside he saved a lot of money. And it seems like he likes to save money as he produces TIE's which are very cheap to build, and therefore are easily taken down in combat.
Seeing the Jedi Temple still standing, brought tears to my eyes.
For those of you wrongly saying that it was destroyed - Obi-Wan and Yoda go walking through parts of it in Ep3 and find the bodies of the dead Jedi.
A battle took place in the temple, hence the smoke, but it wasn't destroyed. Why Palpatine didn't have it torn down is another question and something that will probably come up in the E.U.
I just think as a Sith, hating the Jedi, and having plotted for about 20 years to bring about their demise, why Palpatine would be happy to let their fortress stay up in the middle of the Imperial Capitol. He wants to get rid of the Jedi right . . .
My thinking behind why Palpatine wouldn't destroy the temple is that we know in ANH that the Senate is still there to 'keep the local systems in line'. So it's obvious that people in the Senate are still fighting against Palpatine and trying to bring back the democracy.
So even though Palpatine is Emperor, he's still got problems and he's still playing games with people.
He probably keeps the Jedi Temple standing to appease the Mon Mothma's and Bail Organa's who would use the destruction of the Temple to further their cause and bring more systems into the rebellion.
In ANH when the Imperial Senate is disbanded, you might think that he would destroy the Temple then. But he has bigger problems by that point like farmboys destroying his Death Star.
It seems like I saw a screenshot of Anakin and some clone troopers laying waste to the Jedi Archives. Maybe this scene will show up in the deleted scenes on the DVD edition of ep3? I doubt the temple was actually in usable condition on the inside, and why spend funds destroying something that no longer matters to begin with?
EXACTALLY WH WHOULD HE LEAVE IT SATNDING AND I TYPOED I MENT IS WAS BADDLY MANGLED NOT DESTROYED AND IT LOOK AS IT WOULD CRUMBLE AT NE TIME AND IT LOOKS BRND NEW ITS MIND BOGGLING BUT WHAT OF THE DEAD JEDI I WONDER WHAT THEY DID WITH THEM?LEFT THEM THERE OR GAVE THEM A PROPER CERIMONIAL BURIAL?
I have also heard another theory that Emperor Palpatine remodeled the Jedi Temple into his personal home. What better what to blaspheme the Jedi than to have the Sith lord make his home inside the Jedi's most sacred structure. This is just something I read, no evidence behind it whatsoever.