The terraces encircling Regent’s Park are among the finest examples of Regency town planning in London. They were conceived as part of John Nash’s ambitious scheme for a new royal park and exclusive residential district for the aristocracy and “carriage set.” 
 
The land was formerly Marylebone Park, a royal hunting chase since Henry VIII’s time. In the early 1800s, the Prince Regent (later George IV) commissioned Nash to redesign it as a landscaped park with a royal palace, villas, and grand terraces. Although Nash designed the overall layout and many terraces, several were executed or modified by other architects, notably Decimus Burton and the builder James Burton. Construction spanned roughly 1821–1832.
 
Interesting facts..
21 and 28 Regents terrace where both the residences of Marie-Thérèse Charlotte, Duchess of Angoulême—the sole surviving child of Louis XVI and Marie Antoinette and General Charles de Gaulle. Interesting to think that just 100 years apart the last Monarch and military ruler of France lived in exile.