Brighton began to attract more visitors following improved road transport to London and becoming a boarding point for boats travelling to France.The town also developed in popularity as a health resort for sea bathing as a purported cure for illnesses.More foreign attacks, storms (especially the devastating Great Storm of 1703), a declining fishing industry, and the emergence of nearby Shoreham as a significant port caused its economy to suffer.By 1708 other parishes in Sussex were charged rates to alleviate poverty in Brighton, and Daniel Defoe wrote that the expected £8,000 cost of providing sea defences was "more than the whole town was worth".Writing in 1950, historian Antony Dale noted that unnamed antiquaries had suggested an Old English word "brist" or "briz", meaning "divided", could have contributed the first part of the historic name Brighthelmstone.
Anglo-Saxons then invaded in the late 5th century AD, and the region became part of the Kingdom of Sussex, founded in 477 AD by king Ælle.
The ancient settlement of "Brighthelmstone" was documented in the Domesday Book (1086).
The town's importance grew in the Middle Ages as the Old Town developed, but it languished in the early modern period, affected by foreign attacks, storms, a suffering economy and a declining population.
The contemporary fad for drinking and bathing in seawater as a purported cure for illnesses was enthusiastically encouraged by Dr Richard Russell from nearby Lewes.
He sent many patients to "take the cure" in the sea at Brighton, published a popular treatise Others were already visiting the town for recreational purposes before Russell became famous, and his actions coincided with other developments which made Brighton more attractive to visitors.