Title: Beethoven's musical style
Content:  With the exception of a visit to Vienna in 1787, Beethoven lived in Bonn until 1792, where he worked in the court chapel of the Elector of Cologne. Some forty compositions from this period are extant, including ten early works written by the young adolescent Beethoven when he was being promoted as a child prodigy performer and published as a result of the efforts of his teacher. It has been suggested that Beethoven largely abandoned composition between 1785 and 1790, possibly as a result of negative critical reaction to his first published works. A 1784 review in Johann Nikolaus Forkel's influential Musikalischer Almanack compared Beethoven's efforts to those of rank beginners. Whatever the case, 
Title: Beethoven's musical style
Content:  in 1800 of his first symphony and Septet. The second period spans the period from the publication of his Moonlight Sonata to the Piano Sonata in E minor, Op. 90 in 1814. The last period covers Beethoven's mature works to his death in 1827. Although later scholars have called into question such a simplistic categorisation, it is still widely used. Extensive subsequent analytical consideration of Lenz's thesis has resulted in a slight revision of his original dates and broad consensus regarding Beethoven's three periods is as follows:  Generally, each period demonstrates characteristic stylistic evolutions in Beethoven's musical language and preoccupations as well as important developments in the composer's personal life.
Title: Ludwig van Beethoven
Content:  Ludwig van Beethoven (, ; baptised 17 December 1770 – 26 March 1827) was a German composer and pianist. Beethoven remains one of the most admired composers in the history of Western music; his works rank amongst the most performed of the classical music repertoire and span the transition from the Classical period to the Romantic era in classical music. His career has conventionally been divided into early, middle, and late periods. The "early" period, during which he forged his craft, is typically considered to have lasted until 1802. From 1802 to around 1812, his "middle" period showed an individual development from the 
Title: Heiligenstadt, Vienna
Content:  In the summer months Heiligenstadt was a tourist spot. Ludwig van Beethoven lived there from April to October 1802 while coming to terms with his growing deafness. It was a difficult time for the composer. In a letter to his brothers, the famous Heiligenstadt Testament, he shared thoughts of suicide. But he returned from the town with a rejuvenated outlook as well as new priorities in his music (the start of his "Middle Period"), and lived for a further 25 years.
Title: Ludwig van Beethoven
Content:  styles of Joseph Haydn and Wolfgang Amadeus Mozart, and is sometimes characterized as "heroic". During this time, he began to suffer increasingly from deafness. In his "late" period from 1812 to his death in 1827, he extended his innovations in musical form and expression. Born in Bonn, Beethoven's musical talent was obvious at an early age, and he was initially harshly and intensively taught by his father Johann van Beethoven. Beethoven was later taught by the composer and conductor Christian Gottlob Neefe, under whose tutelage he published his first work, a set of keyboard variations, in 1783. He found relief from a dysfunctional 
Title: Beethoven's musical style
Content: a formative period that extends to 1802 ; a middle period from 1803 to 1814 ; a mature period from 1814 to 1827 Beethoven's musical output has traditionally been divided into three periods, a classification that dates to the first years after the composer's death in 1827 and was formalised with the publication of Wilhelm von Lenz's influential work Beethoven et ses trois styles (Beethoven and his Three Styles). Lenz proposed that Beethoven's creative output be marked by three periods of distinct stylistic personality and he identified specific compositions as milestones for each period. In Lenz's work, the first period opens with Beethoven's Trio set, Opus 1 and culminates with the 
Title: Ludwig van Beethoven
Content:  Some forty compositions, including ten very early works written by Beethoven up to 1785, survive from the years that Beethoven lived in Bonn. It has been suggested that Beethoven largely abandoned composition between 1785 and 1790, possibly as a result of negative critical reaction to his first published works. A 1784 review in Johann Nikolaus Forkel's influential Musikalischer Almanack compared Beethoven's efforts to those of rank beginners. The three early piano quartets of 1785 (WoO 36), closely modelled on violin sonatas of Mozart, show his dependency on the music of the period. Beethoven himself was not to give any of the Bonn works an opus number, save for those which he reworked for use later in his 
Title: Ludwig van Beethoven
Content:  Beethoven's late period began in the decade 1810-1819. He began a renewed study of older music, including works by Palestrina, Johann Sebastian Bach, and George Frideric Handel, whom Beethoven considered "the greatest composer who ever lived". Beethoven's late works incorporated polyphony and Baroque-era devices. For example, the overture The Consecration of the House (1822) included a fugue influenced by Handel's music. A new style emerged, now called his "late period". He returned to the keyboard to compose his first piano sonatas in almost a decade; the works of the late period include the last five piano sonatas and the Diabelli Variations, the last two sonatas for cello and piano, the late string quartets (including the massive Große Fuge), and two works for very large forces: the Missa solemnis and the Ninth Symphony. Works from this period are characterised by their intellectual depth, their formal innovations, and their intense, highly personal expression. The String Quartet, Op. 131 has seven linked movements, and the Ninth Symphony adds choral forces to the orchestra in the last movement.
Title: Beethoven's musical style
Content:  After 1814, Beethoven's output dropped considerably due to turmoil in his personal life, creative exhaustion after 10 years of near constant musical activity, and the challenge of sustaining the Classical style while other composers like Rossini and Weber were moving towards the Romantic style. This resulted in a stylistic change in Beethoven's work, but his continued adherence to the Classical forms he loved meant that the influence of these late works only became apparent after the time of his own younger contemporaries. Beethoven became more concerned with lyricism in this period. Although his melodic skills have been criticised, Beethoven previously utilised 
Title: Beethoven's compositional method
Content:  common themes of heroism and perseverance are evident in his works. Towards the end of this period his proficiency in the classical language becomes apparent. The final period (1813–1827) consisted of Beethoven composing unconventional pieces. This period is sometimes considered to be "transcendent". During the beginning of this period Beethoven's composition halted due to personal issues. Towards the later years he continued composing with strong influences from Mozart and Haydn but also from Baroque composers such as Bach and Handel. Towards the end of his life, he was composing efficiently again and produced some of his most famous pieces.

Question: what music period did beethoven live in?
Answer: Opera.