I made a Trigger on a Watch Tower. Problem is when you move to the Watchtower and activate the Trigger the Trigger Message appears for 1 sek and then the Info pop uo that you conquered the Tower. Maybe same at other Buildings. I dont tested it.
It should be displayed after the Coquereror Message i think. It should be good if there is a Info in the Dropdown Menues where you can read all TriggerMessages Later too!