For 10 points, name this insane Roman Emperor nicknamed "little boots" who planned to make his horse a consul.
A lighthouse at modern day Boulogne-sur-Mer built during the reign of this man was used by his successor in later invasions. This man was accused of incest with his sister Julia Drusilla and he built a gigantic floating palace on Lake Nemi. After the death of his father (*) Germanicus and the imprisonment of his mother Aggripina the Elder, this man was adopted by his great-uncle Tiberius. Rumors of this man's insanity include appointing Incitatus to a political role and claiming seashells as "spoils of the sea" from a invasion of Britain. For 10 points, name this insane Roman Emperor nicknamed "little boots" who planned to make his horse a consul.
A lighthouse at modern day Boulogne-sur-Mer built during the reign of this man was used by his successor in later invasions.
Caligula (accept Gaius Julius Caesar Augustus Germanicus)