It was the largest building of classical Greece: the palace where Alexander the Great was proclaimed king before he launched a conquest that took him as far as modern-day Afghanistan. The Palace of Aigai in northern Greece was fully reopened Friday following a 16-year renovation that cost more than 20 million euros ($22 million) and included financial support from the European Union. It was built more than 2,300 years ago during the reign of Alexander's father, Phillip II.