This is an article talking about minecrafts 15th year anniversary and what you could do / find.

Here are some other minecraft related articles:

Website homepage

here you can mine the background and find 2 chests.

The chests contain:

With Minecraft Classic, you can play minecraft classic here

And with the Partnerships & Celebrations Wallpapers you have 3 buttons:

Clicking any of these will download a zip.

Redeemables

on https://www.minecraft.net/en-us/redeem you can redeem a lot of things. For example: get a cape when watching 15 minutes of twitch streams.