Reading Madrid's Spine: Two Dynasties in Seven Squares

The Habsburg-Bourbon Spine tour walks seven squares from west to east: Plaza Mayor, Plaza de la Villa, the Colegiata de San Isidro, Puerta del Sol, the Plaza de Oriente and Palacio Real, Plaza de Cibeles, and the Buen Retiro. The audio moves fast, one square to the next. What it does not have time to say out loud is the single idea that ties them together.

The spine is not a plan. No architect laid it out. It is a palimpsest, a surface written over twice, first by the Habsburgs and then by the Bourbons, and the whole walk is the archaeology of that overwriting. Once you see it that way, every stop is a stratum.

The Habsburg layer: a capital of ceremony

The Habsburgs made Madrid a capital in 1561 and ruled Spain until 1700. Their instinct was ceremonial and religious, and the first stops on the walk are pure Habsburg.

Plaza Mayor is the clearest statement they left. Juan Gómez de Mora built it between 1617 and 1619 under Philip III, replacing the medieval market square, the Plaza del Arrabal, with an enclosed rectangular stage for the court's public life. This was theater architecture: a single controlled space where proclamations, executions, bullfights, and royal weddings could be staged and watched. The square you see is not the original. Three fires, in 1631, 1670, and 1790, forced repeated rebuilding, and the final reconstruction after 1790 was directed by Juan de Villanueva, whose lower, more uniform design largely defines the plaza today. Even Habsburg Madrid's signature square is partly a Bourbon-era rebuild, which is the palimpsest in miniature. Our piece on Plaza Mayor as a stage rebuilt three times by fire reads that single square in depth.

Plaza de la Villa is the Habsburg court seen from the municipal side: a small square stacking three centuries of buildings, from the fifteenth-century Torre de los Lujanes to the Casa de la Villa, the old city hall commissioned in 1629 under Philip IV. The Colegiata de San Isidro on Calle de Toledo is the Habsburg religious layer, a Jesuit church begun in 1620 modeled on the Gesù in Rome, funded by the will of María of Austria, daughter of Charles V. Together these three stops are a court capital: dense, inward, organized around ritual and the Church.

Puerta del Sol: the hinge

The fourth stop is where the two layers meet. Puerta del Sol began as a Habsburg-era eastern city gate and was transformed under the Bourbons into Madrid's geographic and symbolic center. The Real Casa de Correos, built 1766 to 1768 under Charles III, is a Bourbon building on a Habsburg site. Later still, in 1857, the Kilometre Zero plaque made this the origin point of Spain's radial road network. Sol is the hinge of the whole walk, the place where a defensive Habsburg gate became the enlightenment state's measured center.

The Bourbon layer: a capital of institutions

After Sol, the walk crosses into Bourbon Madrid, and the register changes completely.

The Plaza de Oriente and Palacio Real is the dynastic break made literal. The Habsburg Alcázar, the old fortress-palace, burned on Christmas Eve 1734. The Bourbons did not rebuild it. They demolished the remaining walls by 1738 and commissioned an entirely new Italian-designed palace: Filippo Juvarra first, then Giovanni Battista Sacchetti from 1738, completed in essentials by 1755 under Ferdinand VI, with later work by Francesco Sabatini under Charles III. A French dynasty replaced a Habsburg fortress with an Italian neoclassical palace. You cannot read a clearer sentence about a change of rule.

Plaza de Cibeles is the Bourbon enlightenment at its civic apex. The Cibeles fountain was designed in 1780 by Ventura Rodríguez, the goddess sculpted by Francisco Gutiérrez and the lions by Roberto Michel, as part of the Salón del Prado, the ambitious boulevard project commissioned by the Conde de Aranda and designed from 1767 by José de Hermosilla. This is a monarchy building a public promenade lined with fountains and institutions, an idea of the capital as a display of order and knowledge rather than only court ceremony. That same boulevard is the subject of the Paseo del Arte tour, which reads its museums as one long argument about Spain.

The Buen Retiro closes the walk with a twist that sums up the whole palimpsest. The park was Habsburg in origin, commissioned in the 1630s by the Conde-Duque de Olivares as a royal retreat for Philip IV. But it became public only in 1868, after the Glorious Revolution deposed Isabel II. A Habsburg pleasure ground, opened to the citizens by the events that ended Bourbon rule of that generation. The park is the last stratum, and it holds both dynasties at once.

Why the palimpsest matters for the walk

Read as a designed axis, the spine is confusing, because it was never designed as one. Read as a palimpsest, it becomes legible. Each square is a layer, and the walk from west to east is a walk forward through time, from the ceremonial Habsburg court to the institutional Bourbon enlightenment, with Sol as the seam where one hand stopped writing and the other began.

This is the same logic that explains the city as a whole. Madrid is a capital by decree, built quickly on a town that was never sized for it, and its layered center is the record of successive courts building over each other's work. The spine is where you can see the overwriting most clearly, one square at a time.

When you are ready, start the Habsburg-Bourbon Spine tour and walk the archive yourself. The first stops are free to preview.