In a small village on the outskirts of London stands a barn so vast and magnificent that it has often been likened to a church. Its soaring timber arches rise high overhead, and its cavernous interior inspires the same sense of wonder that one expects to feel inside a medieval cathedral.
This is Harmondsworth Barn, and it was built more than six centuries ago to store grain harvested from the surrounding fields. Today it is widely regarded as one of the finest and best-preserved medieval barns in Europe, a masterpiece of timber construction that demonstrates the wealth, ambition, and engineering skill of medieval England. The poet and architectural campaigner John Betjeman was so impressed by the building that he famously described it as "the Cathedral of Middlesex."
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The village of Harmondsworth, now overshadowed by the nearby Heathrow Airport, was once part of a prosperous agricultural estate owned by Winchester College. The college itself had been founded in 1382 by William of Wykeham, Bishop of Winchester and one of the most powerful men in England.
Wykeham served as Lord Chancellor under King Edward III and accumulated considerable wealth and influence. In addition to founding Winchester College, he also established New College, Oxford. To support these institutions financially, he endowed them with extensive lands and manors whose agricultural output would generate income. One such estate was Harmondsworth Manor.
In about 1426–27, several years after Wykeham's death, construction began on a new barn for the manor. The project was overseen by Winchester College, which appointed two men, William Kypping (or Kipping) and John atte Oke, to oversee the procurement of timbers from Kingston upon Thames to use for the new barn. Dendrochronological studies—the science of dating wood through tree-ring analysis—have shown that the barn’s main timbers were felled in the winter of 1424–25 and the spring of 1426.
Credit: Robert Cutts
The roof tiles were made at Harmondsworth and the walls were constructed of a local material known as ferricrete (a natural iron oxide-cemented gravel). The timber frames would have been made on the ground, then taken to pieces and raised in sections with the timbers slotted into place in the right order to lock the whole structure together.
Harmondsworth Barn measures approximately 58 metres in length and 11 metres in width. The roof ridge rises nearly 15 metres above the ground. The structure was built almost entirely from oak. Hundreds of massive timbers were carefully selected, shaped, and joined together using traditional carpentry techniques. The roof is supported by a series of enormous timber trusses. Each truss consists of intricately connected beams that distribute the weight of the roof while creating the elegant arch-like appearance that visitors admire today.
The barn was intended primarily as a storage facility for grain harvested from the college’s land. The crops grown included wheat, barley and oats, as well as peas and beans ‘in the stalk’. Grain was among the most valuable commodities in medieval England. The barn protected these valuable crops from rain and pests.
Interior view showing a man shovelling grain in the Great Barn at Harmondsworth. Credit: Historic England
For roughly 150 years, the barn remained part of the Winchester College estate. In 1544, Henry VIII took the manor of Harmondsworth to add it to his hunting ground. Four years later, in 1547, the estate was sold to the powerful Paget family. The Pagets would later become the Earls of Uxbridge and subsequently the Marquesses of Anglesey. They retained ownership of the manor until 1774. During this period the estate was increasingly divided among tenant farmers, though the Great Barn remained the dominant agricultural building on the property. Around this time, the barn’s north wing was demolished, so the original building was even larger than what exist today. Harmondsworth Barn continued to be used to store grains until the 1970s.
After farming ceased, the barn survived largely intact, although it suffered a serious fire in 1972 and required periodic repairs. In 2006 it was purchased by an offshore investment company as a speculative property investment. Maintenance largely stopped, and the condition of the building began to deteriorate.
Concerned about its future, in 2011, English Heritage purchased the barn, carried out urgent repairs, and added it to the National Collection of Historic Sites. It opened to the public in 2012.
Credit: Wikimedia Commons
Credit: slocumjoseph
References:
# History of Harmondsworth Barn. English Heritage
# The Great Barn at Harmondsworth. Country Life
# The Great Barn at Harmondsworth. Douglas Rust
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