Shrine of Mehrunes Dagon

Description
The shrine is dedicated to Mehrunes Dagon is the Daedric Prince of Destruction. The shrine door will be locked and the site devoid of any worshipers unless Silus's quests are done. To gain access to the interior of the shrine and to spawn the two daedra outside, the quest Pieces of the Past must be completed.

Very close and easily accessible from this location is a Skyborn Altar wordwall.

All four of the Daedra respawn after a week (in game time), two inside and two outside the shrine.

Loot
Daedra Hearts can be looted from the Dremora. There are multiple chests with gold and enchanted equipment inside, as well as already open chests filled with Gold Ingots and Ebony Ingots. Also, all of the ingots and ingredients within the shrine respawn when the Daedra do, about 7 in-game days. The shrine can be a great source of the materials required to smith Daedric Armor.

Location
Just East of Morthal on a Mountain. A good approach is from Fort Dunstad, which is east of the Shrine. Once you

Bugs
The Daedra may not respawn/spawn at all outside or inside no matter how long you wait. No fix is possible, its really recommended to make an backup save before goin with Silus to the Shrine, so you can "test" if they will spawn. Anyway, some people related they have came back after some really long in-game time (lacking sources).