Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The following is a timeline of lesbian, gay, bisexual, and transgender (LGBT) related history.Marriage between men in Greece was not legally recognized, although life-long relationships between adult men were not uncommon. The partnerships between two men in Greece were similar to heterosexual marriages with the exception that generally there was about a generation difference in age and the older person served as the educator or mentor.The Roman Empire is a time in which art and literature depict homosexual love in a positive light. Romans, like the Greeks, celebrated love and sex amongst men. Two Roman Emperors publicly married men, some had gay lovers themselves, and homosexual prostitution was taxed. However, like the Greeks, passivity and effeminacy were not tolerated, and an adult male freeborn Roman could lose his citizen status if caught performing fellatio or being penetrated.