Under Ptolemy II Philadelphus, who ruled Egypt in the middle of the third century B.C.E., Alexandria became the brilliant multicultural capital of the Greek world. Theocritus's poem in praise of Philadelphus--at once a Greek king and an Egyptian pharaoh--is the only extended poetic tribute to this extraordinary ruler that survives. Combining the Greek text, an English translation, a full line-by-line commentary, and extensive introductory studies...