The sealing of the Sacred Realm is one of the only known events during the Era of Chaos. This is detailed in The Legend of Zelda: Hyrule Historia as 'The Battle for the Sacred Realm'.
Hyrule Historia Excerpts
English
"The legend of a supreme power spread throughout the land, whetting the appetites of those who would possess the Triforce and inciting vicious battles between them. Rauru, the Sage of Light, constructed the Temple of Time, which contained the only existing entrance to the Sacred Realm, where the Triforce was located. With power stronger than both time and the Master Sword, Rauru sealed the Sacred Realm. The pedestal holding the Master Sword was closed behind the Door of Time, and the keys to opening the door (the Spiritual Stones of forest, fire, and water) were protected by their respective people"[1].
Japanese
Translation Source: LoruleanHistorian
万能の力の伝承は人々の欲望をかきたて、トライフォースをめぐる争いが絶えず起こるようになる。
Ban'nou no chikara no denshou wa hitobito no yokubou o kakitate, Toraifousu o meguru arasoi ga taezu okoru you ni naru.
“Folklore pertaining to the absolute power of the Triforce stirs up people's desires, and constant fighting unfolds as a result.[2]”
光の賢者ラウルは、トライフォースのある聖地への唯一の入口として、時の神殿を造った。時を超える力とともに、聖地をマスター ソードで封印。マスターソードの台座は時の扉で閉ざし、3つの精霊石をその扉を開く鍵として、それぞれを信頼のおける森の民、火 の民、水の民に守らせた。
Hikari no kenja Rauru wa, Toraifousu no aru seichi e no yuitsu no iriguchi toshite, toki no shinden o tsukutta. Toki o koeru chikara to tomo ni, seichi o Masutaa-soodo de fuuin. Masutaa-soodo no daiza wa toki no tobira de tozashi, san-tsu no seirei-ishi o sono tobira o hiraku kagi to shite, sorezore o shinrai no okeru more no min, hi no min, mizu no min ni mamora seta.
“Rauru, the sage of light, built the Temple of Time over the sole entrance into the Sacred Realm. Using a power that transcends time, the Sacred Realm was sealed with the Master Sword. The pedestal of the Master Sword is closed behind the Door of Time, and the keys to open it are the three spiritual stones. These were entrusted to the forest folk, fire folk, and water folk for safekeeping.”[2]
トライフォースは光の神殿に 安置され、ラウルは現世と隔離された聖地で、神の力を守り続 けることになる。
Toraifousu wa hikari no shinden ni anchi sare, Rauru wa gense to kakuri sareta seichi de, kami no chikara o mamori tsudzukeru koto ni naru.
“With the Triforce enshrined in the Temple of Light, Rauru remained isolated within the Sacred Realm and continued to protect the power of the gods.”[2]
