Radial Hubs vs. Grid Blocks: Two Philosophies of Power Made Visible from Space

Strip a city down to nothing but its streets and you are not looking at infrastructure. You are reading a political argument.

There are, broadly speaking, two ways to organize a city. You can radiate outward from a center, every boulevard aimed like a cannon at a monument or seat of power. Or you can lay down a grid, block after block, where no single intersection claims precedence over any other. The first says: here is the center of the world, and you will orient yourself to it. The second says: every corner is equal, figure it out yourself.

Paris chose the first. Chicago chose the second. Washington, D.C., tried to have both and ended up with something stranger than either.

The Baron’s Demolitions

When Baron Georges-Eugene Haussmann began his renovation of Paris in 1853, he did not renovate. He obliterated. Over seventeen years, his teams demolished roughly 20,000 buildings and erected 40,000 new ones. Entire medieval neighborhoods were erased to make way for the grands boulevards that define the city today – those long, impossibly straight avenues that converge on the great landmarks like spokes on a wheel.

Haussmann’s motivations were layered. Napoleon III wanted a modern capital. The hygienists wanted light and air in a city ravaged by cholera. The military wanted streets wide enough to march troops through and too broad for revolutionaries to barricade – the narrow medieval lanes had proved too effective at enabling insurrection in 1830 and 1848.

But the spatial logic was always about sight lines. Stand at the Arc de Triomphe and twelve avenues radiate outward in perfect symmetry. Stand at the Place de la Republique, the Opera, the Madeleine – every major node offers the same experience: long views terminating at monuments. The city is a machine for seeing power.

Joseph Rykwert observed in The Seduction of Place that Haussmann’s Paris was designed to produce “a city of vistas,” where the act of walking down a boulevard is an act of orientation toward the state. You are always moving toward something or away from something. You are never simply in the grid.

L’Enfant’s Diagonal Ambition

Pierre Charles L’Enfant had studied Paris before he designed Washington in 1791, and it shows. His plan for the new American capital is a grid – the young republic demanded that much democratic geometry – but it is a grid slashed by diagonal avenues that create those same radial convergences.

L’Enfant’s original plan placed the Capitol and the President’s House (not yet the White House) as the two poles of the city, connected by Pennsylvania Avenue and surrounded by a web of diagonal boulevards named after the states. Each diagonal intersection was intended as a public square, a node of civic life.

The result is a city that reads, from above, as a compromise between Enlightenment rationalism and Baroque theatrical planning. The grid is there, but it is constantly interrupted. The diagonals create odd triangular lots, circles, and those infamous traffic rotaries that confound drivers to this day. Washington is a city of clashing geometries, and the clash is the point: it encodes the tension between egalitarian ideals and the desire for monumental authority.

What L’Enfant understood – and what Haussmann would later exploit more ruthlessly – is that diagonal avenues create hierarchy. When you carve a straight line through a grid, the two endpoints become important simply by being connected. The avenue between the Capitol and the White House is not just a road. It is a declaration of relationship.

Burnham’s Democratic Geometry

Daniel Burnham’s 1909 Plan of Chicago begins with a remarkable sentence: “Make no little plans; they have no magic to stir men’s blood.” But the Plan itself is more restrained than that famous exhortation suggests. Where Haussmann demolished to create radial vistas, Burnham proposed to extend and perfect Chicago’s existing grid.

The grid was already there, laid down in the 1830s by surveyors following the Land Ordinance of 1785, which had divided the entire American interior into a relentless matrix of mile-square sections. Chicago’s grid is not really Chicago’s invention. It is the federal survey grid made urban – the same logic that organized Kansas wheat fields applied to city blocks.

And that is precisely what makes it radical. In a grid city, no intersection is architecturally more important than any other. The corner of State and Madison is significant because of what humans chose to build there, not because the street plan grants it primacy. The grid is agnostic. It provides a framework and steps back.

Burnham did propose a civic center and radial boulevards overlaid on the grid, echoing Haussmann and L’Enfant. Most of those proposals were never built. What survived – and what defines Chicago – is the grid itself: mile-long blocks running north-south and east-west with a regularity that is almost hypnotic from the air.

What You See When You See Nothing But Streets

This is where the argument becomes visual, and where minimalist map art makes it legible in a way that standing at street level never can.

When you strip the map of Paris down to its street network – removing buildings, parks, the Seine’s texture – what remains is a starburst pattern. Dense clusters of radiating lines erupt from the Places and Etoiles, connected by long straight corridors. The medieval tissue of the Marais and the Left Bank appears as a tangle, but the Haussmann interventions read as unmistakable incisions: geometry imposed on organic growth.

Chicago, stripped the same way, is a textile. A weave. The regularity is so consistent that variations become dramatic – the diagonal slash of Milwaukee Avenue, the gentle curve where the river bends, the interruption of the expressways. The grid has the quality of a fabric that has been torn in places, and those tears tell you everything about what happened to the city in the twentieth century.

Washington, D.C. is the most complex reading. The grid and the diagonals compete for your eye. The result looks almost like a crystal lattice under stress – regular structure shot through with fault lines. The Mall reads as a void, an absence of streets that is itself a statement: this space is not for commerce or habitation, it is for the nation.

The Argument That Never Ends

The radial-versus-grid debate did not end in the nineteenth century. It resurfaces every time a city is planned or replanned. Brasilia (1960) chose radial sectors. Chandigarh (1950s) chose a grid. The New Urbanists of the 1990s championed grids for walkability. The Gulf states built radial highway systems around monuments to modernity.

The reason the argument persists is that it is not really about streets. It is about whether a city should have a center – a point toward which everything converges and from which all meaning radiates – or whether a city should be a field of equal possibilities, a surface rather than a hierarchy.

When you hang a map of Paris on your wall, you are hanging a portrait of centralized authority made elegant. When you hang a map of Chicago on your wall, you are hanging a portrait of democratic indifference made beautiful. Neither is neutral. Neither is just lines on paper.

The streets remember the argument even when the people walking them have forgotten it.