Final answer:
The significance of the Royal Crescent lies in its architectural grandeur, harmony, and beauty according to de Botton.
Step-by-step explanation:
The significance of the Royal Crescent in Bath, England, according to de Botton, lies in its architectural grandeur and its ability to evoke a sense of awe and beauty.
De Botton sees the Royal Crescent as a testament to human creativity and ingenuity, and it represents a harmonious integration of natural and man-made elements. The crescent shape of the buildings, along with the overall design, creates a sense of unity and harmony that is visually striking.