Irish sweathouses ( Irish: ''teach allais'') are a type of traditional

sauna A sauna (, ) is a room or building designed as a place to experience dry or wet heat sessions or an establishment with one or more of these facilities. The steam and high heat make the bathers perspire. A thermometer in a sauna is used to meas ...

found on the island of

Ireland Ireland (, ; ; Ulster Scots dialect, Ulster-Scots: ) is an island in the North Atlantic Ocean, in Northwestern Europe. Geopolitically, the island is divided between the Republic of Ireland (officially Names of the Irish state, named Irelan ...

. In the

Irish language Irish (Standard Irish: ), also known as Irish Gaelic or simply Gaelic ( ), is a Celtic language of the Indo-European language family. It is a member of the Goidelic languages of the Insular Celtic sub branch of the family and is indigenous ...

they are called ''teach allais,'' which translates as 'house of sweat'. They are built using stone and are found in rural areas, particularly in the northwest region of

Connacht Connacht or Connaught ( ; or ), is the smallest of the four provinces of Ireland, situated in the west of Ireland. Until the ninth century it consisted of several independent major Gaelic kingdoms (Uí Fiachrach, Uí Briúin, Uí Maine, C ...

. They were first recorded in 1796 by French writer Chevalier de Latocnaye, who observed local people using them as a cure for sore eyes and other ailments.

Distribution

There are over 300 sweathouses on the island of

. The Sites and Monuments Record lists 258 sweathouses in the

Republic of Ireland Ireland ( ), also known as the Republic of Ireland (), is a country in Northwestern Europe, north-western Europe consisting of 26 of the 32 Counties of Ireland, counties of the island of Ireland, with a population of about 5.4 million. ...

and there are 44 sweathouses listed in the

Northern Ireland Northern Ireland ( ; ) is a Countries of the United Kingdom, part of the United Kingdom in the north-east of the island of Ireland. It has been #Descriptions, variously described as a country, province or region. Northern Ireland shares Repub ...

Sites and Monuments Record. These monuments occur in high density around the northwest region, particularly in

County Leitrim County Leitrim ( ; ) is a Counties of Ireland, county in Republic of Ireland, Ireland. It is in the Provinces of Ireland, province of Connacht and is part of the Northern and Western Region. It is named after the village of Leitrim, County Leitr ...

, where are there are over 100 examples recorded including St. Hugh's Well and Sweat House just off the long distance trail - the

Leitrim Way The Leitrim Way is a 57km long-distance trail between Leitrim village, and Manorhamilton, County Leitrim, Ireland. This route is generally completed over 2–3 days, and brings walkers through a variety of landscape forms common to this part of ...

. They are frequently situated beside streams, rivers and lakes, because it was custom for people to immerse themselves in cold water after bathing in the sweathouse.

Morphology

Sweathouses are generally built using the

dry stone Dry stone, sometimes called drystack or, in Scotland, drystane, is a building method by which structures are constructed from stones without any mortar to bind them together. A certain amount of binding is obtained through the use of carefully ...

technique, however, some examples have been built using a

lime mortar Lime mortar or torching is a masonry mortar (masonry), mortar composed of lime (material), lime and an construction aggregate, aggregate such as sand, mixed with water. It is one of the oldest known types of mortar, used in ancient Rome and anci ...

. These monuments can be circular, oval or sub-rectangular in plan. They are single chambered and windowless, but many have a hole in the apex of the roof to allow smoke to escape. Sweathouses often have a

corbelled In architecture, a corbel is a structural piece of stone, wood or metal keyed into and projecting from a wall to carry a bearing weight, a type of bracket. A corbel is a solid piece of material in the wall, whereas a console is a piece applie ...

roof, but there are cases where a roof

lintel A lintel or lintol is a type of beam (a horizontal structural element) that spans openings such as portals, doors, windows and fireplaces. It can be a decorative architectural element, or a combined ornamented/structural item. In the case ...

is present instead. These structures also have low, narrow doorways, to help keep heat inside the chamber when in use. These structures bear a resemblance to other Irish field

monument A monument is a type of structure that was explicitly created to commemorate a person or event, or which has become relevant to a social group as a part of their remembrance of historic times or cultural heritage, due to its artistic, historical ...

s such as

clochán A (plural ) or beehive hut is a dry-stone hut with a corbelled roof, commonly associated with the south-western Irish seaboard. The precise construction date of most of these structures is unknown with the buildings belonging to a long-estab ...

s and

lime kiln A lime kiln is a kiln used for the calcination of limestone (calcium carbonate) to produce the form of lime called ''quicklime'' (calcium oxide). The chemical equation for this reaction is: CaCO3 + heat → CaO + CO2 This reaction can tak ...

s; in some cases they are mistaken for them.

Origins

It is unclear where the sweathouse tradition originated from. Some scholars believe that Roman missionaries brought the idea of 'hot air baths' to Ireland when

Christianity Christianity is an Abrahamic monotheistic religion, which states that Jesus in Christianity, Jesus is the Son of God (Christianity), Son of God and Resurrection of Jesus, rose from the dead after his Crucifixion of Jesus, crucifixion, whose ...

was introduced to the island in the

Early medieval The Early Middle Ages (or early medieval period), sometimes controversially referred to as the Dark Ages, is typically regarded by historians as lasting from the late 5th to the 10th century. They marked the start of the Middle Ages of Europ ...

period. Others have suggested that the

Vikings Vikings were seafaring people originally from Scandinavia (present-day Denmark, Norway, and Sweden), who from the late 8th to the late 11th centuries raided, pirated, traded, and settled throughout parts of Europe.Roesdahl, pp. 9� ...

, who raided Irish coastal settlements in the 8th and 9th centuries, brought the idea of sauna bathing to Ireland with them. The Irish sweathouse could be much older, but until sufficient evidence comes to light, this question will remain unanswered.

Uses

Sweathouses were commonly used to treat symptoms of illnesses such as

rheumatism Rheumatism or rheumatic disorders are conditions causing chronic, often intermittent pain affecting the joints or connective tissue. Rheumatism does not designate any specific disorder, but covers at least 200 different conditions, including a ...

. However, they were seen by some as a 'treatment for all ills' and were used to cure a wide range of maladies, such as

fever Fever or pyrexia in humans is a symptom of an anti-infection defense mechanism that appears with Human body temperature, body temperature exceeding the normal range caused by an increase in the body's temperature Human body temperature#Fever, s ...

sciatica Sciatica is pain going down the leg from the lower back. This pain may go down the back, outside, or front of the leg. Onset is often sudden following activities such as heavy lifting, though gradual onset may also occur. The pain is often desc ...

lumbago Low back pain or lumbago is a common disorder involving the muscles, nerves, and bones of the back, in between the lower edge of the ribs and the lower fold of the buttocks. Pain can vary from a dull constant ache to a sudden sharp feeling. ...

, sore eyes,

pleurisy Pleurisy, also known as pleuritis, is inflammation of the membranes that surround the lungs and line the chest cavity (Pulmonary pleurae, pleurae). This can result in a sharp chest pain while breathing. Occasionally the pain may be a constant d ...

gout Gout ( ) is a form of inflammatory arthritis characterized by recurrent attacks of pain in a red, tender, hot, and Joint effusion, swollen joint, caused by the deposition of needle-like crystals of uric acid known as monosodium urate crysta ...

pneumonia Pneumonia is an Inflammation, inflammatory condition of the lung primarily affecting the small air sacs known as Pulmonary alveolus, alveoli. Symptoms typically include some combination of Cough#Classification, productive or dry cough, ches ...

influenza Influenza, commonly known as the flu, is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These sympto ...

and

arthritis Arthritis is a general medical term used to describe a disorder that affects joints. Symptoms generally include joint pain and stiffness. Other symptoms may include redness, warmth, Joint effusion, swelling, and decreased range of motion of ...

References

{{Reflist Sauna Buildings and structures in Ireland