Two tiered circular courtyard, Charles V Palace, Granada, Andalusia, Spain

Palace of Charles V, Alhambra, UNESCO World Heritage Site, Granada, Province of Granada, Andalusia, Spain, Europe

Palace of Charles V, Alhambra, UNESCO World Heritage Site, Granada, Province of Granada, Andalusia, Spain, Europe

St. Peter's Square, Vatican, Rome, Lazio, Italy, Europe

Sunrise on the old tower seen from colonnade of the semi-circular portico, Plaza de Espana, Seville, Andalusia, Spain, Europe

Pedalos on the Potomac River Tidal Basin by The Thomas Jefferson Memorial , Washington DC, USA

Monopteros at the English Garden in Munich, Upper Bavaria, Bavaria, Germany, Europe

Sunrise on the old tower seen from colonnade of the semi-circular portico, Plaza de Espana, Seville, Andalusia, Spain, Europe

One of the two buildings that constitute the exedra, design by Gaetano Koch, Piazza della Repubblica, Piazza Esedra, Rome, Latium, Italy, Europe