Can you regain entry to thalmor embassy after you complete thalmor embassy mission in Skyrim?

Yes, you can regain entry to the Thalmor Embassy in Skyrim after completing the Thalmor Embassy mission. However, this can only be done by using a specific method, such as the "Disguise" option through the quest "Diplomatic Immunity," or by using certain spells like Invisibility. If you have previously completed the quest and want to return, you will generally need to sneak in or find alternative ways to interact with the embassy.