How Defensive Fortifications Shaped Cities

A post on Gizmodo traces the long and evolving history of defensive fortifications and how they influenced how cities were built and how people lived.

1 minute read

December 31, 2014, 9:00 AM PST

By James Brasuell @CasualBrasuell


Dave Munson provides a history of how defensive fortifications shaped cities. Starting with early settlements built on hills in Syria, the discussion shifts to citadels, like in Iraq and other places, to outer walls, like those in many cities in Germany.

Eventually the discussion focuses on star-shaped fortifications, meant to deflect cannon fire, such as Fort Pitt in Pittsburgh and Fort Hill in Baltimore. According to Munson, there was one age of warfare in particular that reversed the millennia long trends of cities providing protection from the violence of war: " The nuclear era was the first time that the incentive for defense actually pushed people out of cities. When you have a single weapon that can kill hundreds of thousands in an instant and level an entire city, urban areas start to look less like refuges and more like targets." 

Monday, December 22, 2014 in Gizmodo

Young Professional

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban and Environmental Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban and Environmental Planner

Get top-rated, practical training for planners

"Planetizen federal action tracker" logo superimposed over black and white image of US Capitol dome.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

September 16, 2026 - Zachary Whalen

Overlapping highways

The state-sanctioned urbicide of Austin

People don’t kill cities. Freeways do.

September 8, 2026 - Benjamin Schneider

The Hoover Dam blocking the Colorado River. The river's water level is noticeably low. The cliffs surrounding the blue water are brown and jagged.

US to reduce Colorado River water deliveries to Mexico

A new Colorado Treaty amendment reduces Mexico’s Colorado River water allocation by 250,000 acre feet.

September 11, 2026 - The Arizona Republic

A coal power plant in Iowa billows smoke into the air.

Nation's most wind-powered state turns to coal as data centers increase energy demand

For the first time in decades, Iowa has increased its generation of coal power.

1 hour ago - Inside Climate News

A sign on a fence describing the rain garden behind it.

NYC cools commuters with city's first rain garden above a bus stop

New York City officials say the plants in the rain garden can absorb 16 gallons of rainwater during heavy storms.

2 hours ago - Gothamist

A map showing Brightline West's intended route from  Las Vegas to Rancho Cucamonga, California.

Brightline West’s future may rely on $6 billion federal loan

The company has until Nov. 2 to make a $400 million equity investment into its proposed high-speed rail line.

3 hours ago - Smart Cities Dive

FREE Course: Walkable City 1: Why Walkability?

After describing his path towards focusing on walkability as the essence of good planning, Jeff Speck marches through his five principal reasons for making more walkable places.

Reinventing Malls: Planning Alchemy—Turning Gray Fields Into Gold

The course focuses on the opportunities and imperatives that shape reinvention of mall sites.