1. Birth: Athenian citizenship was primarily determined by birth. Only those born to Athenian parents were considered citizens. This principle was known as "jus sanguinis" or "right of blood."
2. Legitimate Birth: To be considered a legitimate Athenian citizen, a person had to be born to parents who were both Athenian citizens and legally married. Illegitimate children or children born to foreign parents were not eligible for citizenship.
3. Male Gender: Athenian citizenship was exclusively reserved for males. Women, regardless of their parentage or status, were not considered citizens and did not have the same rights and privileges as male citizens.
4. Age: An individual had to reach a certain age to become a citizen. This age varied over time but was typically around 18 or 20 years old. At this age, young men would undergo military training and be formally enrolled as citizens.
5. Property Ownership: In certain periods of Athenian history, citizenship was associated with property ownership. Only those who owned a certain amount of land or other property were considered eligible for citizenship. This requirement aimed to ensure that citizens had a stake in the city's welfare and could contribute to its defense and prosperity.
6. Unblemished Record: An individual seeking citizenship had to have a clear and unblemished record. They could not have committed any serious crimes or offenses that would disqualify them from citizenship. This requirement aimed to maintain the integrity and reputation of the citizen body.
7. Religious Qualifications: In some periods, religious qualifications were also imposed. Those who did not adhere to the traditional Athenian religious practices or worshipped foreign deities might be excluded from citizenship.
It's important to note that these criteria were not always strictly applied, and there were exceptions and modifications to the rules over time. Additionally, the Athenian democracy evolved and underwent several reforms throughout its history, which could affect the specific requirements for citizenship.