Answers about…
bricks in the Bible

Bricks served as the foundational building material for millennia. They enabled the rise of the world’s earliest urban civilizations after the worldwide Flood.

The first known mud bricks appeared in sites like Jericho.

See: “Is the Bible accurate concerning the destruction of the walls of Jericho?”

Bricks found among the ruins of Babylon and Nineveh are about a foot square [30.48 centimeters] and 4 inches thick [10.16 centimeters].

They were usually dried in the sun, though also sometimes in kilns (2 Samuel 12:31; Jeremiah 43:9; Nahum 3:14). (See NEBUCHADNEZZAR.)

The bricks used in the tower of Babel were burnt bricks, cemented in the building by bitumen (Genesis 11:3).

See information on brick-making in our article: “Is there archaeological evidence of the Tower of Babel?”

The scarcity of suitable stone in many riverine plains (especially the alluvial flats between the Tigris and Euphrates) made bricks the practical choice, derived from abundant local clay, silt, and mud. Mesopotamia emphasized bricks due to stone scarcity and flood risks, leading to their innovations in firing and glazing their bricks.

When the children of Israel became enslaved by the Egyptians, they were forced to make vast numbers of mud-bricks for their masters.

So the Egyptians brutally compelled the sons of Israel to slave labor; and they made their lives bitter with hard slave labor in mortar and bricks and in all kinds of slave labor in the field, all their slave labor which they brutally compelled them to do. —Exodus 1:13-14

Types of Bricks and Manufacturing

Ancient Middle Eastern bricks came in two primary forms, each with distinct properties and uses:

• Sun-dried mud bricks (unfired/adobe-style)

  The most common and earliest type. Makers mixed clay or silt (often from riverbanks like the Nile or Euphrates) with water, sand, and organic temper such as chopped straw, chaff, reeds, or animal dung. This mixture went into wooden molds for uniformity, then dried in the sun. Straw prevented cracking during drying and added tensile strength. These bricks were cheap, quick to produce, lightweight, and provided excellent thermal insulation—keeping interiors cooler during the day and warmer at night in hot, arid climates. However, they were vulnerable to erosion from rain, floods, or wind, requiring regular maintenance, plastering, or rebuilding.

• Fired (baked) bricks

  An innovation pioneered in Mesopotamia around 4000–3500 BCE during the Uruk period or earlier. These underwent kiln-firing at high temperatures, making them far more durable, water-resistant, and stronger—resistant to erosion and suitable for load-bearing or exposed elements. Fired bricks were costlier due to fuel needs (often reeds or wood) and labor, so they appeared more selectively in monumental or high-status structures. Glazing techniques later developed, especially in Babylon, allowing colorful, decorative surfaces with molded reliefs.

Brick shapes evolved: Early examples included hand-molded plano-convex (domed on one side, flat on the other) or cigar-shaped forms in Neolithic and Early Dynastic Mesopotamia. Standardized rectangular molds became common later, facilitating precise stacking, arches, vaults, and complex architecture. Sizes varied by region and era but often followed modular standards that influenced building proportions.

Brick production was labor-intensive and often organized at scale, sometimes involving rituals or ceremonies (e.g., in Mesopotamia, the “first brick” for pagan temples might involve an offering to their god). Large workforces, including corvée labor or slaves, produced them.

Bricks in primary construction

Bricks were overwhelmingly used for architecture, forming the backbone of daily life, urban planning, and monuments:

• Domestic housing

  Nearly all private homes, from simple one-room dwellings to multi-story elite residences and palaces, relied on mud bricks. Walls were often built on stone foundations (to combat moisture), with mud plaster finishes. Roofs used beams, reeds, and more mud brick or plaster. In Mesopotamia, houses clustered in cities like Uruk or Ur.

  In Egypt, bricks supported everyday and administrative structures. Bricks’ thermal properties made them ideal for the region’s climate.

• Monumental and religious structures

  Quantities of bricks used were enormous—ziggurats, palaces, and city platforms required millions of bricks, reflecting organized labor, resource management, and state control.

  • Ziggurats (stepped temple towers) in Mesopotamia (e.g., the Ziggurat of Ur) used vast quantities of sun-dried mud bricks for cores, often with fired brick facings or platforms for durability against elements. These symbolized supposed divine connection and royal power.

  • Temples, palaces, and city walls in Sumer, Babylon, Assyria, and Elam.

  • In Egypt, mud bricks built palaces, administrative buildings, granaries (e.g., for storing grain as in Joseph’s responsibility to the pharaoh), workshops, and even parts of temples or pyramids’ subsidiary structures. The core of some Middle Kingdom pyramids (like at Hawara) incorporated mud bricks, while stone was reserved for outer casings or elite tombs.

    Egypt blended mud bricks with cut stone blocks (stone for eternal tombs/temples; bricks for mutable daily structures).

• Defensive and infrastructure elements

  Massive city walls, fortifications, and platforms/rafts (to elevate structures above floods) in Mesopotamian cities.

  Fired bricks strengthened gates or exposed sections.

  In the ancient Israel and the broader Near East, early urban sites like Jericho used mud bricks for settlement walls and buildings. Bricks also enabled advanced urban features like drainage systems in some places.

• Vaults, arches, and specialized features

  Mud bricks allowed sophisticated techniques like corbelled vaults or domes in Egypt and Mesopotamia, seen in granaries (e.g., Ramesseum) or enclosures. Fired bricks supported more ambitious spans in later periods.

Decorative bricks

Glazed fired bricks with molded reliefs (e.g., lions, dragons, or bulls on Babylon’s Ishtar Gate under Nebuchadnezzar II) displayed great royal power, wealth, and artistic sophistication.

Painted or glazed bricks ornamented temple facades. Such brick production was a major industry, employing specialists. While most people lived in plain mud-brick homes, the elite displayed their wealth with fired/glazed variants signaling their status.

However, firing and glazing could strain local fuel supplies.

Durability and maintenance

Simple sun-dried bricks required periodic replastering or rebuilding, contributing to layered “tells” (mound sites) from accumulated debris. Fired bricks extended lifespan but were not universal due to cost. Climate played a key role—arid conditions favored mud bricks, but seasonal rains necessitated protective measures.

Perishability meant many structures have not survived as well as their stone counterparts, biasing our view toward Egypt’s stone monuments.

Roman use of bricks

In the ancient Roman world (roughly from the late Republic through the Empire, circa 1st century BC to 5th–6th century AD), bricks—primarily fired (kiln-baked) clay bricks—emerged as a transformative building material that supported Rome’s massive urbanization, monumental architecture, and infrastructure across a vast empire spanning Europe, North Africa, and the Near East.

While the Romans had long used sun-dried mud bricks (similar to earlier Near Eastern traditions) for simpler or temporary structures, fired bricks became widespread and perfected during the early Empire, especially at the time of Christ (1st century AD onward).

This shift coincided with advances in Roman concrete (opus caementicium), which bricks often complemented rather than replaced outright. Bricks paired with concrete enabled greater load-bearing and more ambitious engineering elements enabling the “Roman architectural revolution” of large interior spaces. Roman fired bricks excelled in longevity (many structures survive today due to this and concrete’s pozzolanic chemistry).

While Roman use of stone captures the grandeur in popular imagination, bricks formed the hidden backbone of much of Rome’s built legacy.

Roman bricks differed markedly from modern ones: they were typically longer, flatter, and thinner (often resembling large tiles), with standard sizes including:

• Bipedales (about 59 cm × 59 cm × ~4–6 cm thick, or two feet long)

• Sesquipedales (roughly 1.5 Roman feet)

• Smaller bessales or triangular/square/circular variants for specialized uses

They were made from local clays (often red or white), tempered, molded, dried, and fired in kilns. Production was highly organized: large brickyards (figlinae) on estates near clay deposits and transport routes (e.g., along the Tiber River near the city of Rome), sometimes owned by elites or the imperial family, with slaves or workers producing them.

Roman bricks were frequently stamped with marks indicating the manufacturer, estate, date, or even the legion supervising production—providing valuable archaeological dating evidence.

Quantities used were staggering. Bricks offered advantages over stone alone: faster construction, lower cost in many areas, excellent fire resistance (crucial after disasters like the Great Fire of Rome in 64 AD), good thermal properties, and versatility for curves, domes, and vaults.

Rome’s famous roads, bridges, and harbors used bricks in piers, vaults, and retaining walls. City walls, city streets, gates, and some fortifications also used bricks.

Roman baths (thermae) used bricks extensively used for walls, vaults, and especially heating systems (raised floors with brick pillars channeling hot air). Examples include the Baths of Caracalla and Baths of Diocletian in Rome, where bricks supported large halls and intricate plumbing.

The Pantheon (rebuilt under Hadrian) incorporated bricks in its dome and walls (combined with concrete); imperial palaces on the Palatine Hill (e.g., Domus Tiberiana, Flavian Palace) and Nero’s Domus Aurea relied heavily on brick-faced concrete.

The Theater of Marcellus (late 1st century BC) and parts of the Colosseum (Flavian Amphitheater) used bricks for structural elements, arches, and substructures, often alongside travertine stone.

Aqueducts used bricks for facing or to support channels, piers, and arches for water transport (e.g., sections of the Aqua Claudia or provincial aqueducts).

Multi-story insulae (apartment blocks) in dense cities like Rome and Ostia (Rome’s port), where brick construction helped mitigate fire risks and allowed more rapid building. Villas, warehouses (horrea), and private homes across the empire also utilized bricks. Occasionally molded or patterned bricks were used on facades.