The 12 months just past marked a red-letter year for New York’s ingrained culture of corruption.

None of the victories in the battle against abuse came from the halls of government — for that, thank prosecutors, particularly US Attorney Preet Bharara.

Two of Albany’s “three men in a room” — Assembly Speaker Sheldon Silver and Senate Majority Leader Dean Skelos — were indicted, tried and convicted on corruption charges in trials that exposed Albany’s rancid political system for all to see.

After long careers in the plush seat of power, both now face a long stretch behind bars.

(The third man, Gov. Cuomo, is still reportedly under investigation for his abrupt shutdown of the anti-corruption Moreland Commission.)

Nor were they the only current and former legislators to be brought down in 2015 for lining their pockets. Nearly three dozen have been convicted in recent years.

But the only change is that everyone in Albany wonders who might be wearing a wire.

Neither house of the Legislature showed any shame that their chosen leaders turned out to be crooks. Indeed, both houses had to be hectored into ousting those leaders in the wake of the corruption indictments.

Concrete proof of continued shamelessness is the refusal of any state elected officials and political committees to give back the cash they took from Glenwood Management — a firm at the other end of Silver’s and Skelos’ sale of their offices.

Glenwood ladled out $14 million or so to buy favors — which is why it went to the most influential pols, from Cuomo on down.

The money is hopelessly tainted, even if no favors were directly exchanged. It’s not enough for a public official to simply deplore political corruption if they’re willing to profit from it.

By refusing to return it, Cuomo, Attorney General Eric Schneiderman, Comptroller Tom DiNapoli and the entire Legislature are endorsing the culture of corruption.

And telling all New Yorkers to expect nothing different in 2016.