I'm sure this has been answered somewhere. I used the search function and cannot find it. Also consulted the Travian FAQ and it's not specific enough.
Let's assume you conquer a village from a player. The hero's mansion is at level 20 before conquer and the village has 2 oases attached.
When you conquer a village from an enemy player and the Hero's Mansion is at level 19 after conquer, do you still keep the 2 oases?