The story
Welcome to the heart of the "White City." As you stand here on Calle La Merced, take a moment to look closely at the walls surrounding you. You aren’t just looking at common stone; you are looking at the frozen breath of volcanoes.
This is sillar, a pearly white volcanic tuff that defines every inch of Arequipa’s historic center. If you reach out and run your hand along the walls near number 408, you’ll feel its porous, almost lightweight texture. It is the reason Arequipa glows under the high Andean sun, reflecting a light so bright it can be almost blinding.
Just a few steps away, this street opens up into the magnificent Plaza de Armas. It is often called the most beautiful square in Peru, and for good reason. Look at the sweeping arcades that frame the plaza.
Those rows of arches, carved entirely from sillar, have stood as silent witnesses to centuries of history, from colonial processions to modern celebrations. Looming over the northern side is the Basilica Cathedral. Unlike most cathedrals in South America that sit on a single side of a square, this one stretches across the entire length of the plaza.
Its twin towers reach for the sky, often framed perfectly by the massive, snow-capped silhouette of the Misti volcano in the distance, the very source of the stone beneath your feet. As you walk down Calle La Merced, you are standing in front of the Church of La Merced. Built and rebuilt since the 16th century, it is a prime example of what historians call the "Mestizo Baroque" style.
Look closely at the intricate carvings around the main portal. You’ll see a fascinating blend of worlds. While the structure and the saints are Spanish in origin, the hands that carved this sillar belonged to indigenous artisans.
Among the angels and vines, you can spot local flowers and symbols native to the Andes. It was their way of weaving their own identity into the very fabric of the colonial city. Arequipa has survived countless earthquakes throughout the centuries precisely because of this stone.
Sillar is remarkably resilient and flexible, yet soft enough to be carved into the delicate, lace-like filigree you see on the balconies and cornices above you. It is a city built from the fire of the earth, yet it appears as cool and serene as a pearl. As you continue your stroll, notice how the light changes on the stone.
In the midday heat, it is a brilliant, clinical white. As evening approaches, it softens into a dusty, romantic pink. Take your time here.
Let the white walls of La Merced whisper the story of a city that is as much a product of the mountains as it is of the people.