[TTC Video] Stephen Ressler - Understanding Greek and Roman Technology

[TTC Video] Stephen Ressler - Understanding Greek and Roman Technology


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Course Overview
Famed for great thinkers, poets, artists, and leaders, ancient Greece and Rome were also home to some of the most creative engineers who ever lived. Many of their feats have survived; others have disappeared into the mists of time. But modern research is shedding new light on these renowned wonders—impressive buildings, infrastructure systems, and machines that were profoundly important in their own day and have had a lasting impact on the development of civilization.

The glories of ancient Greek and Roman engineering include these iconic buildings:

The Greek Parthenon: Arguably the most aesthetically pleasing structure ever built, the Parthenon achieves this effect through astonishing precision in its architectural plan and stone masonry construction.
The Roman Colosseum: This ingeniously designed, mammoth arena represents a grand compromise between traditional stone masonry and a revolutionary construction method incorporating brick and concrete.
The Roman Pantheon: The ancient world’s most ambitious engineering achievement, the Pantheon is known for its cast concrete dome that has never been equaled in beauty or construction ingenuity.
Also on the list of impressive achievements are ancient technologies that you use every day:

Roads: Networks of well-drained, hard-surfaced roads are a legacy of the Romans, who even installed curbs, wide shoulders, and periodic steps to aid travelers in mounting horses or carriages.
Water systems: Large-scale systems for supplying clean water and drains for carrying away wastewater were also developed by the Romans, whose aqueducts and sewers transformed urban life.
Pumps: The Greeks and Romans invented a variety of techniques to move water. One, Archimedes’ screw, remains in widespread use today in devices from combine harvesters to snowblowers.
These and many other developments grew out of the same conditions that produced new political institutions, stunning sculptures, outstanding literary works, and empires that constituted much of the known world. In such a climate, is it any wonder that technology also flourished? Yet the engineering exploits of the Greeks and Romans are not as celebrated as they deserve to be, and they have been long discounted by some historians. However, new discoveries combined with a reevaluation of evidence show just how clever our ancient ancestors were.

In 24 lavishly illustrated lectures, Understanding Greek and Roman Technology: From Catapult to the Pantheon gives you an in-depth appreciation for what the Greeks and Romans achieved and how they did it. Your guide is Dr. Stephen Ressler, a former professor at the United States Military Academy at West Point, a civil engineer, and a nationally honored leader in engineering education.

A Golden Age of Engineering

Understanding Greek and Roman Technology is a fascinating introduction to basic engineering principles and the science behind them. The course also gives a new perspective on one of the most productive periods in the history of civilization: classical antiquity. In case after case, you will find that engineering solutions reached during this era would not be surpassed for another thousand years or more.

These lectures are also ideal preparation for anyone planning to visit Greek or Roman sites. Even ancient building rubble is captivating if you know what to look for: tool marks, holes for joining pegs, projections used for lifting, and other signs that tell the purpose of a particular block of stone. Professor Ressler describes a field trip to an archaeological site in Turkey, where one of his students noticed chiseled Greek letters on foundation stones—markers that were clearly used to place the stones in their correct positions.

Clue by clue, Professor Ressler assembles a detailed picture of how ancient engineers went about their work. First you learn about the building materials available in antiquity and their strengths and weakness under different loads. Then you proceed to the three major sections of the course, which cover structures, infrastructure, and machines. Here is a taste of what you will learn:

Concrete: The versatility of form and composition of concrete made possible enormous structures and efficient new architectural forms in Rome’s awe-inspiring building program. Professor Ressler demonstrates the role of concrete in a sturdy Roman wall.
Cranes: Trajan’s Column in Rome consists of marble drums weighing as much as 60 tons each. How were they lifted into place? Professor Ressler shows how cranes powered only by human muscles were up to the job.
Catapults: Engineers improved catapults over a period of 700 years, developing new ways to store energy and propel a heavy projectile to its target. Innovations associated with this weapon include the universal joint, now used in automobiles.
Triremes: Professor Ressler’s favorite piece of ancient technology is the trireme, the racehorse of Greek warships, with three banks of oars and a bronze ram. Details of its design and construction were long uncertain—until 20th-century enthusiasts decided to build one.
Lead pipes: One of the many theories explaining the fall of Rome blames chronic lead poisoning from lead pipes used in water systems. But Professor Ressler explains why this idea does not “hold water.”
Slaves: A widespread theory contends that the Greeks and Romans had no incentive to develop labor-saving machines because of their access to slaves. But Professor Ressler proves that many ancient projects would not have been possible without unprecedented technology.
Bibliotheca Alexandrina