George Frideric Handel
George Frideric Handel was a German-English Baroque composer, who is famous for his operas, oratorios, and concerti grossi. His life and music may justly be described as "cosmopolitan": he was born in Germany, trained in Italy, and spent most of his life in England. Born as Georg Friedrich Händel in Halle in the Duchy of Magdeburg, he settled in England in 1712, becoming a naturalized subject of the British crown on 22 January 1727. His works include Messiah, Water Music, and Music for the Royal Fireworks. It was strongly influenced by the techniques of the great composers of the Italian Baroque era, as well as the English composer Henry Purcell, Handel's music became well-known to many composers like Haydn, Mozart, and Beethoven. He was born on the same years as johann sebastian bach and Domenico scarlatti.
Handel displayed his musical talent at an early age of seven. He was a skillful performer on the harpsichord and pipe organ.However, his father, a distinguished citizen of Halle and an eminent barber-surgeon who served as valet and barber to the courts of the Duchy of Saxe-Weissenfels and the Margraviate of Brandenburg, was opposed to his son's wish to pursue a musical career, preferring him to study law. By contrast, Handel's mother, Dorothea, encouraged his musical aspirations. Despite that, he was permitted to take lessons in musical composition and keyboard technique from Friedrich Wilhelm Zachow. He also learnt about harmony and contemporary styles. He analyzed scores and learned to work fugue subjects and copy music. Sometimes he would take his teacher's place as organist for services.

His contribution
He composed music for the Royal Fireworks; 12,000 people came to listen. He was then commissioned to write four anthems for the coronation ceremony of King George II. One of these, Zadok the Priest, it has been played at every British coronation ceremony. His compositions include 42 operas; 29 oratorios; more than 120 cantatas, trios and duets; numerous arias; chamber music; a large number of ecumenical pieces; odes and serenatas; and sixteen organ concerti. His most famous work, was the Messiah oratorio with its "Hallelujah" chorus.It was most common during christmas season.

MUSICAL OUTPUT
One of the work composed by handel is massiah oratoria.The hallelujah chorus is found in the middle of Parts II and III -- the "Easter" section. Because of the popularity of this association, it is common for Advent performances to include the first 17 numbers of the work and then follow immediately with the No. 44 "Hallelujah" chorus as a finale. The most famous and oft-quoted example of the technique is in Every valley shall be exalted, the tenor aria early in Part I of Messiah. On the lyric "...and every mountain and hill made low; the crooked straight and the rough places plain", Handel composes it thus:

The notes climb to the high F♯ on the first syllable of mountain to drop an octave on the second syllable. The four notes on the word hill form a small hill, and the word low descends to the lowest note of the phrase. On crooked, the melody twice alternates between C♯ and B to rest on the B for two beats through the word straight. The word plain is written, for the most part, on the high E for three measures, with some minor deviation. He applies the same strategy throughout the repetition of the final phrase: the crookeds being crooked and plain descending on three lengthy planes. He uses this technique frequently throughout the rest of the aria, specifically on the word exalted, which contains several sixteenth note (semiquaver) melismas and two leaps to a high E.