He wears a hat to protect his bald 'dome' from the summer sun.
The team's new stadium is a 'dome'.
the 'dome' of the Capitol building
(..) a situation here. God, I love this place. Yeah, don't start celebrating yet, guys. We got more incoming outside the dome. It's too late. We need to destroy the stone now. Vision, get your ass back on the table. (..)2018 Avengers: Infinity War