A boy's mother is his first love, but little is known about Beethoven's. Her union with Beethoven's father, court singer Johann, was her second marriage. She bore him seven children, but only three survived infancy. Her life wasn't easy: Her alcoholic husband was physically abusive, and she died of tuberculosis in 1787 shortly after Ludwig had returned to Bonn after a studying in Vienna.

Franz Gerhard Wegeler, a friend from Beethoven's youth, referred to a certain "beautiful and gracious mannered Fräulein v.W.," to whom Beethoven was "most lovingly attracted." And although Wegeler described it as a "Werther love" - in reference to Goethe's tragic novel "The Sorrows of Young Werther" - it seems that Miss v.W. didn't leave any particularly enduring mark on the composer's life.

In 14 love letters between 1804 and 1809, the composer called his recently widowed piano student "angel," "my everything" and his "only love." But their letters have a tone of desperation; had they married, she would have lost custody of her four young children. She married someone else in 1810, while Josephine's sister Therese claimed that Beethoven and the countess were made for each other.

In 1801 or 1802, the Brunsvik sisters introduced Beethoven to their cousin, also a countess. It was love at first sight, but it was clear to both that due to their differing social status, marriage was out of the question - and Giulietta was already engaged. It seems Beethoven was drawn to impossible romances. But the composer did dedicate his "Moonlight Sonata" to Giulietta.

After Josephine Brunsvick remarried in 1810, Beethoven seriously entertained thoughts of proposing marriage to Therese von Malfatti, even writing back home in Bonn for a copy of his baptisim certificate. Both Therese and her family were against the union due to class differences, however. Beethoven seems to have gotten over it rather quickly, and they remained friends.

Beethoven gave Marie the handwritten original of the "Appassionata" sonata, and their emotional connection is clear in his letters to her. In early March 1807, he invited her along on an excursion. But after her husband's jealous reaction, he wrote to the couple saying, "I would never be in a more than friendly relationship with another man's wife."

Beethoven met the 15-year-old in early 1808. In those days, a common nickname for "Elisabeth" was "Elise" - and the wistful little piano piece "Für Elise" is one of the best-known compositions ever. At Beethoven's request, she visited him on his death bed, where he gave her a lock of his hair and his last quill. Music researchers have concluded that Fräulein Röckel is the enigmatic "Elise."

The sister-in-law of the poet Bettina Brentano wrote in 1811 that "dearest" Beethoven visited her "nearly daily." It was to Antonie that Beethoven gave the handwritten score of the song "An die Geliebte" (To the Beloved). It's also documented that Antonie once traveled from Prague to Karlsruhe on a critical date, which could be relevant for the next woman in Beethoven's life…

Dated July 6 and 7, 1812, and penned in the Bohemian spa town of Teplitz, the letter to an "Immortal Beloved" is addressed to a woman Beethoven had met with days earlier in Prague and who had then traveled on to "K." (possibly Karlsruhe). So was it Antonie Brentano? Or Josephine Brunsvik, whom he'd also just met and who gave birth to a daughter nine months later? Music researchers still disagree.