Bathing played a major part in ancient Roman culture and society. It was one of the most common daily activities and was practiced across a wide variety of social classes. Though many contemporary cultures see bathing as a very private activity conducted in the home, bathing in Rome was a communal activity. While the extremely wealthy could afford bathing facilities in their homes, private baths were very uncommon, and most people bathed in the communal baths (thermae). In some ways, these resembled modern-day destination spas as there were facilities for a variety of activities from exercising to sunbathing to swimming and massage. Such was the importance of baths to Romans that a catalogue of buildings in Rome from 354 AD documented 952 baths of varying sizes in the city. Public baths became common throughout the empire as a symbol of "Romanitas" or a way to define themselves as Roman. They were some of the most common and most important public buildings in the empire as some of the first buildings built after the empire would conquer a new area. Although the wealthiest Romans might set up a bath in their townhouses or their country villas, heating a series of rooms or even a separate building especially for this purpose, and soldiers might have a bathhouse provided at their fort (as at Cilurnum on Hadrian's Wall, or at Bearsden fort), they still often frequented the numerous public bathhouses in the cities and towns throughout the empire. Small bathhouses, called balneum (plural balnea), might be privately owned, while they were public in the sense that they were open to the populace for a fee. Larger baths called thermae were owned by the state and often covered several city blocks. The largest of these, the Baths of Diocletian, could hold up to 3,000 bathers. Fees for both types of baths were quite reasonable, within the budget of most free Roman males. Greek influence Some of the earliest descriptions of western bathing practices came from Greece. The Greeks began bathing regimens that formed the foundation for modern spa procedures. These Aegean people utilized small bathtubs, washbasins, and foot baths for personal cleanliness. The earliest such findings are the baths in the palace complex at Knossos, Crete, and the luxurious alabaster bathtubs excavated in Akrotiri, Santorini; both date from the mid-2nd millennium BC. They established public baths and showers within their gymnasium complexes for relaxation