One of the most well-known Elven realms in J.R.R. Tolkien's The Lord of the Rings is Lothlórien, thanks in large part to Peter Jackson's film adaptations. Lothlórien has been depicted in various forms of media, from art to film to video games. In Amazon's upcoming series, The Lord of the Rings: The Rings of Power, there is potential for Lothlórien to be featured as a setting, especially with one of the main characters being a future leader of the realm.
Lothlórien was originally established as an enclave of Elves who had defected from the rest of their party during The Great Journey, a march that many Elves made from their place of awakening to Valinor. Instead of traveling to Valinor, these Elves, known as the Nandor Elves, settled in the forested area that would become Lothlórien. Over time, the population of Lothlórien became a mix of Nandorian, Avarin, and Silvan Elves known as Galadhrim or "People of Trees."
During the Second Age, Lothlórien was ruled by a Sindarin king named Amdír, and the realm was called Lórinand. However, Amdír's line ended with his death in the War of the Last Alliance against Sauron. Different versions of his son Amroth's story exist, but in Tolkien's writings, Amroth is depicted as the son of Celeborn and Galadriel. After Amroth's tragic fate, Galadriel and Celeborn ruled Lothlórien as lord and lady.
Lothlórien played a crucial role in the War of the Ring. Its proximity to Mirkwood and Sauron's fortress of Dol Guldur made it an important stronghold against Sauron's forces. The Elves of Lothlórien faced attacks from Orcs but eventually sent their own forces to attack Dol Guldur, weakening it and allowing Galadriel to bring down its walls. Thanks to Galadriel's power, Lothlórien remained mostly untouched by Sauron during the war.
After Galadriel left Middle-earth for the Undying Lands, Celeborn ruled Lothlórien alone for a period of time before establishing the realm of East Lórien in a portion of Mirkwood granted to him by Thranduil. However, with Galadriel's departure and the departure of the Elven rings from Middle-earth, the magic and luster of Lothlórien faded.
In the Fourth Age, Celeborn finally departed Middle-earth, and with him went the last living memory of the Eldar Days. Although Celeborn has been portrayed in various forms of media, his appearance in The Rings of Power has yet to be seen.