Those are wonders from Big Huge game's Rise of Nations.
I made graphics darker and higher contrast, to adapt to Age of Empires II's style.
Buildings:
Angkor Wat
Chateau de Versailles
Coloseum
Colossus
Eiffel Tower
El Dorado
Forbidden City
Hanging Garden
Particle Accelerator
Porcelain Pagoda
Pyramid
Red Fort
Space Shuttle
Statue of Liberty
St. Brasil's Cathedral
Taj Mahal
Temple of Tikal
Terra Cotta Warriors