Museums are a feature introduced in DLC zones. Each "museum" offers a list of associated tasks. These are essentially unmarked quests that require searching for numerous missing items that are considered to be part of a larger collection.
Wrothgar 
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House of Orsimer Glories — Recover artifacts throughout Wrothgar to help document the achievements of the Orsimer.
Hew's Bane 
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- Kari's Hit List — Steal worthless historical trinkets to prove your skill to the Thieves Guild.
Gold Coast 
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- Litany of Blood — Assassinate targets marked by the Dark Brotherhood and send their souls to the Void.
Vvardenfell 
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- Library of Vivec — Collect plaque rubbings from ancestral tombs to assemble a miniature map of Vvardenfell.
Clockwork City 
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- Precursor Maker — Reassemble an ancient factotum with pieces from all across Tamriel.
Summerset 
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- The Vault of Moawita — Retrieve the 20 dangerous relics stolen from the Vault of Moawita.
Murkmire 
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- Xinchei-Konu Monument — Retrieve the 12 tablets stolen from the Xinchei-Konu Monument.
Northern Elsweyr 
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- House of Histories — Retrieve the 16 mural fragments stolen from the House of Histories.
Southern Elsweyr 
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- Pieces of History — Gather pieces of the priceless Khajiit tapestry, Khajiit of the Moons, to honor its history and inspire the citizens of Senchal.
Western Skyrim 
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- Bards College — Locate and retrieve all 19 musical instruments and deliver them to the Bards College in Solitude.