Update: The time period setting is now confirmed for Amazon's Lord of the Rings TV series.

"Welcome to the Second Age," Amazon tweeted on Thursday morning.

The Second Age is also known as 'The Age of Númenor' – and the island of Númenor appears in the map in the tweet below.

During that time period, which spans about 3,441 years, the Dark Lord Sauron forged the Ring of Power.

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Welcome to the Second Age: https://t.co/Tamd0oRgTw — The Lord of the Rings on Prime (@LOTRonPrime) March 7, 2019

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The Lord of the Rings TV series will air on Amazon Prime.

Original article: Amazon's The Lord of the Rings TV series has started teasing fans on social media, with a map of Middle-earth that actually gives us some information about their adaptation of JRR Tolkien.

A couple of days ago, the official Twitter account posted the first incarnation of the map, which admittedly raised more questions than answers.

But this update has seemingly confirmed one of our biggest queries about the series, and that is when it is set.

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Seven for the Dwarf-lords in their halls of stone, pic.twitter.com/Btk2CRsQI2 — The Lord of the Rings on Prime (@LOTRonPrime) February 18, 2019

Related: Last ever The Lord of the Rings spin-off story released

This map includes the region of Calenardhon, which is what Rohan was called back in the day under Gondorian rule, which suggests that the series is a prequel.

Rohan was founded hundreds of years before the birth of Aragorn, so it looks like him being the focus of the series is out of the window.

The One Ring is said to have remained dormant from after Isildur died in the Second Age until Smeagol found it, so perhaps the series will focus on the events covered in The Fellowship of the Ring movie's opening scene, with young Elrond, Isildur and co.

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There is also the possibility that this map isn't directly referencing the show's timeframe, and are just laying out the history of the world.

With the series not expected for some time, we may not get concrete info anytime soon.

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