Jerusalem is the capital of Israel, though not internationally recognized as such. If the area and population of East Jerusalem is included, it is Israel's largest city in both population and area, with a population of 763,800 residents over an area of 48.3 square miles. Located in the Judean Mountains, between the Mediterranean Sea and the northern edge of the Dead Sea, modern Jerusalem has grown far beyond the boundaries of the Old City. Jerusalem is a holy city to the three major Abrahamic religions—Judaism, Christianity and Islam. In Judaism, Jerusalem has been the holiest city since, according to the Torah, King David of Israel first established it as the capital of the united Kingdom of Israel inc. 1000 BCE, and his son Solomon commissioned the building of the First Temple in the city. 

Barcelona – Spain's enchanting capital, second largest and most populous city. It is a huge city that vibrates with life, and there’s certainly not another city in the country to touch it for its sheer style, looks or energy. It is one of the world's leading tourist, economic, trade fair and cultural centers, and its influence in commerce, education, entertainment, media, fashion, science, and the arts all contribute to its status as one of the world's major global cities. Barcelona is home to masterpieces of many great architects – the most famous of which is Antoni Gaudí. 

Piraeus is a city in the periphery of Attica,  Greece and within the Athens urban area, located 12 km southwest of its center and upon the Saronic Gulf. According to the 2001 census, Piraeus has a population of 175,697 people within its administrative limits, making it the third largest municipality in Greece and the second within the Greek capital following the municipality of Athens. The Piraeus urban area extends beyond the administrative city limits to the suburban municipalities, with a total population of 466,065.