Sketching a guided-missile battleship

What would a guided-missile battleship look like in a modern military setting?

A massive, heavily protected and highly automated arsenal ship with a command bunker, many missiles and guns, layered defenses, and possibly nuclear power.

The concept uses extensive automation, a crew concentrated inside a protected citadel, and large numbers of missiles and guns. Its power demand might push it toward nuclear propulsion, while armor and layered defensive fire would support a design intended to absorb punishment. A composite protection scheme could alternate face-hardened steel with concrete-like material rather than simply recreating traditional armor plate. The result is less a revived gun battleship than a protected arsenal and command ship built around power, sensors, magazines, and survivability.