The Love Letters of Abelard and Heloise are a collection of medieval love letters written between the 12th-century French philosopher Peter Abelard and his student, Heloise d'Argenteuil.

In Twelfth Night, Viola falls in love with Duke Orsino and writes him a love letter, expressing her feelings while disguised as Cesario.

Mariana Alcoforado's love letters were addressed to the French officer Marquis de Chamilly, with whom she had a brief but intense love affair.

Robert Browning wrote love letters to Elizabeth Barrett Browning under the pseudonym "R.B." before they met in person.

In Jane Austen's "Pride and Prejudice", Mr. Darcy writes a heartfelt love letter to Elizabeth Bennet, expressing his deep feelings for her.

Napoleon Bonaparte wrote passionate love letters to his wife, Josephine, expressing his devotion and longing for her.

Lady Mary Wortley Montagu's love letters to her husband, Horace Walpole, are known for their wit, charm, and insightful observations of society.

Robert Browning wrote love letters to his wife, Elizabeth Barrett Browning, expressing his deep affection and admiration for her.

In Emily Brontë's "Wuthering Heights", Heathcliff writes a passionate love letter to Catherine Earnshaw, expressing his undying love and devotion for her.

Johann Wolfgang von Goethe wrote love letters to his wife, Sophie von Kühn, filled with tenderness, devotion, and philosophical musings.

In Margaret Mitchell's "Gone with the Wind", Rhett Butler writes a passionate love letter to Scarlett O'Hara, declaring his love and desire for her.

Rainer Maria Rilke wrote love letters to his wife, Alma Mahler, expressing his deep love, admiration, and longing for her.

In F. Scott Fitzgerald's "The Great Gatsby", Jay Gatsby writes a passionate love letter to Daisy Buchanan, declaring his undying love and devotion for her.

Franklin D. Roosevelt wrote love letters to his wife, Eleanor Roosevelt, filled with affection, admiration, and political insights.

In Gabriel García Márquez's "Love in the Time of Cholera", Florentino Ariza writes a passionate love letter to Fermina Daza, declaring his undying love and devotion for her.