The Talos Cult is a group of worshippers of the great Tiber Septim, founder of the Third Empire. In order to join, new recruits swear an oath to give up their lives in attempting to put a strong man back on the throne of Tamriel. They have many followers within the Imperial Legion, conspiring to assassinate whoever the current emperor may be and replace him to prevent the Empire's decline.
The Tarnished are those who lack the skill required to become a Clockwork Apostle and lack another desirable skill to be a merchant, craftsmen, and other roles. As a result they are cast out and become Tarnished. The Tarnished live in the realm of The Clockwork city within the city The Brass Fortress Within the slums of Slag Town and in the outlaw refuge. The Tarnished feel abandoned by the Clockwork Apostles and often have to rely on themselves to get by.
Temple of Kynareth
"Our Lady is the Goddess Kynareth whose sphere is the Heavens itself. She is sometimes called the Goddess of Air, the Pure One. It was She who gave the Lords Mail to the Warrior Lord Morihaus to combat the unclean Daedric spirits. By the glory of our Lady, we have become the greatest physicians in Tamriel -- our ability to cure magical and mundane diseases is truly unrivalled. Other temples cure only their own priests, but we are philanthropists. Of course, the Goddess shows special favor on Her own. We do take in new initiates, provided they show devotion to the Goddess and have the skill to make their devotion worthwhile." -- An unknown Kynareth follower
Temple of Stendarr
"Our God is the God of Mercy, Stendarr. Some mock our compassion, calling us sentimental fools and tenderhearts. But the truth is that everyone, no matter their strength, crawls to us when Sai, the God of Luck deserts them as he is prone to do. Our gift to the traveller is a simple one -- we heal those who are in pain. For more complicated ailments, diseases and poisonings, we direct you to the Temple of Kynareth. With due respect, for they are the finest apothecaries and we, the finest chirurgeons. If one possesses the desire and aptitude, one may join the Temple. Though we desire to help all Tamrielans, we only possess the means to train and assist a small handful. Sometimes, it is best to begin one's compassion with oneself." -- An unknown follower of Stendarr
The Temple Saints are the most honored ancestors of the Dunmer, canonized by the Tribunal Temple for deeds they have performed during their lifetime. They are celebrated as models of virtue and piety, often invoked for aid and protection. After the fall of the Tribunal, the three Tribunes were re-appointed as saints by the New Temple.
The Ternion Monks was a monastic order based in Skyrim. They were dedicated to the worship three animal totems: bear, wolf and fox, collectively known as the Three Old Gods. Their religion itself is ancient, dating back the Atmorans and their worship of the animal totems. The monks are also known for their healing magic, and can call forth aspects of the Three Old Gods. With the help of these spirits, the monks can perform tasks beyond the scope of mortal limitations.
The Ternion Monks typically worship and meditate in holy retreats that are almost inaccessible outsiders. Often, access to these temple is only possible with the use of magic, and entry to outsiders is only granted if they are in great need and are worthy. By the Second Era, the order was in decline as very little proselytizing took place and fewer and fewer converts took up the worship of the Three Old Gods.
In 2E 582 the Ebonheart Pact sought the aid of the Ternion Monks in order to cure High King Jorunn, who was suffering from the effects of a potent Daedric poison. The Soulless One, with the aid of the aspects of the Three Old Gods, entered Joruun's nightmares and saved him.
The Thalmor refers to an Altmeri governmental organization that has served each of the three Aldmeri Dominions in varying capacities. It is also a general term for the members and paramilitary enforcers of that organization.
The Thieves Guild is dedicated to the gathering and training of those who are stealthy and shadowy in nature. Although criminal by its very definition, for untold years, local authorities in places throughout Tamriel have tolerated the existence of the guild for its role as "crime regulator", as it does not tolerate competition or egregious conduct from its members (not to mention the personal financial benefits for authorities who play nice). It is usually considered to be a distinctly Imperial entity, though of course other organizations of the Empire do not officially condone their actions.
Like any trade guild, the Thieves Guild is an organization of professionals, except that in this case the professionals are burglars, robbers, pickpockets, smugglers, and other enterprising operators. They typically don't have public guild halls, but sometimes have safe-houses, and members tend to gather at a single location in large towns, such as at a cornerclub, inn, or tavern. Typically, members are bound not to rob each other, kill anyone while thieving, or rob the poor. The Thieves Guild usually has the resources to bribe officials, establish a black market of stolen goods, and maintain a network of informants. For historical information, see the Lore article.
The Tribunal Temple was the native religion of the Dunmer of Morrowind. They worshipped Almalexia, Sotha Sil, and Vivec, known together as the Tribunal or Almsivi. Most people usually just call it "the Temple". They accept outlanders as members, but most of the few outlanders that do join, join only for the services provided. On Vvardenfell, the Temple District included the city of Vivec, the fortress of Ghostgate, and all sacred and profane sites (including those Blighted areas inside the Ghostfence) and all unsettled and wilderness areas, as the Treaty of the Armistice with the Empire maintained the island as a Temple preserve. In practice, this district included all parts of Vvardenfell not claimed as Redoran, Hlaalu, or Telvanni Districts.
The Temple maintained less than favorable relations with most of the Imperial guilds of Morrowind. However, it maintained strong relations with the pious House Indoril and House Redoran, and was friendly with House Dres and House Hlaalu. When the Tribunal fell apart, the Tribunal Temple underwent a reformation, becoming the New Temple.
The Twin Lamps was the secret, underground slave recovery and rescue guild of Morrowind. The group helped free slaves, primarily Argonians and Khajiiti and transport them out of Morrowind to safety. They used the Argonian Mission in Ebonheart as a base of operations. Their head in Morrowind was Ilmeni Dren, the daughter of Duke Vedam Dren. They commonly used the phrase: "Have you seen the Twin Lamps?" to recognize fellow members, the answer required being: "They light the way to freedom."