Imagine spending most of your day lying in bed.
The room is shared with another patient. You hear the movements of nurses in the corridor, water running into a washbasin and the small sounds of another person trying not to disturb you.
Above you, the ceiling is not hospital white. It is painted a darker, calmer shade because this is the surface you see most often. The main light does not shine directly into your eyes. The washbasin has been shaped to reduce splashing and noise. Outside the window, tall pine trees fill the view.
These details might now be described as human-centred design. In the early 1930s, they formed part of something much more radical: a hospital designed from the patient’s point of view.
Paimio Sanatorium, completed in 1933 in south-western Finland, was designed by the young architects Aino and Alvar Aalto as a tuberculosis sanatorium. It became their international breakthrough and one of the defining buildings of modern Finnish architecture.
Yet the building’s lasting significance is not simply that it looks modern.
It is that almost every part of it asks the same question:
What does this room feel like to the person who must live in it?
A hospital in the pine forest
Paimio Sanatorium stands outside the small town of Paimio, surrounded by forest.
The location was not treated merely as empty land on which to place a hospital. The landscape formed part of the design. Different wings were positioned according to their functions, orientation, light and relationship with the surrounding air and trees.
The long patient wing opened towards sunlight. Balconies and a large rooftop sun terrace gave patients access to the outdoors. In the medical thinking of the period, rest, daylight and fresh air were important elements of tuberculosis care.
Architecture did not cure the illness. Paimio was still a hospital treating a serious and frequently fatal disease. But the building was intended to support treatment by making the long periods of rest, isolation and institutional life more bearable.
This distinction matters.
The story of Paimio is sometimes simplified into the attractive claim that the building itself was designed as a “medical instrument”. That captures part of its ambition, but it can also make architecture sound more powerful than it was.
The sanatorium’s real achievement was more practical and perhaps more humane. It recognised that a patient does not experience treatment as medicine alone. Treatment also happens in a room, in a bed, under a light, beside a window and among the sounds of other people.
Designing from the bed upwards
Many important buildings are designed to impress the person arriving at the entrance.
Paimio was also designed for the person staring at the ceiling.
The patient rooms were conceived as carefully organised living environments for two people who might remain there for long periods. Their colours, lighting, furniture, heating and acoustics were considered from the viewpoint of someone who was tired, unwell and often lying down.
The ceilings were darker than the walls because patients looked upwards from their beds. Lighting was designed to avoid unnecessary glare. Some surfaces and furnishings were selected to make cleaning easier and reduce places where dust could accumulate.
The specially designed washbasins were intended to be used with as little noise as possible. Each patient had a basin, an unusually generous provision at the time, and its form helped one person wash without disturbing a resting roommate.
Even this modest object reveals something important about the building.
The basin did not need to be visually dramatic. Its value came from recognising a small friction in everyday life: the sound of water in a quiet shared room.
The same attention extended to cupboards, lighting fixtures, radiators, door handles and windows. The building was treated not as a shell into which hospital equipment would later be placed, but as a complete environment in which architecture, interiors and daily routines belonged together.
The interior colour scheme was developed with decorative artist Eino Kauria. Yellow floors enlivened the main staircase, corridors carried stronger colours, and the patient rooms were more restrained. Against the white exterior, the interior was unexpectedly rich and carefully differentiated.
Modernism without the coldness
When Paimio was designed, European modernist architecture was closely associated with new materials, standardisation, industrial production and the idea that buildings should follow their functions.
The sanatorium clearly belonged to this movement. Its reinforced-concrete structure, long horizontal windows, specialised wings and advanced technical systems were expressions of the new Functionalism.
But the Aaltos’ interpretation of modernism was already becoming distinct.
Modern architecture did not have to mean that every surface felt mechanical or every object was made from steel. At Paimio, industrial logic was combined with wood, colour, curves and the forms of the surrounding landscape.
The best-known example is the Paimio chair, designed for the sanatorium’s patients’ lounge. Its thin, curved birch seat appears to float between two continuous wooden loops. Instead of copying the tubular-steel furniture favoured by many European modernists, the Aaltos explored what could be achieved with bent laminated wood.
The chair would later become an international design icon and an important product for Artek, the company founded in 1935 by Aino and Alvar Aalto, Maire Gullichsen and Nils-Gustav Hahl. At Paimio, however, it began as one part of a much larger environment.
That context is easy to forget when a chair moves from a hospital lounge into museums, design catalogues and expensive living rooms.
Paimio was not originally a collection of design classics. It was a working institution. Its furniture and objects were intended to solve real problems for patients and staff.
The work of more than one famous architect
Paimio Sanatorium is often introduced simply as a building by Alvar Aalto.
That description is incomplete.
The project was designed by the architectural office shared by Alvar and Aino Aalto. Aino was an architect, designer and central creative partner whose role in the development of the office’s interiors, furniture and practical approach to everyday living was substantial.
The wider Paimio project also involved doctors, engineers, craftspeople, manufacturers, artists and members of the architectural office. Eino Kauria contributed to the colour scheme, while lighting and furniture development involved specialist manufacturers and designers.
This collaborative character is also reflected in Finland’s current UNESCO nomination. The official Aalto Works proposal recognises buildings created by Alvar Aalto in collaboration with Aino Marsio-Aalto, Elissa Aalto, employees of the Aalto studio and Artek.
The distinction does not diminish Alvar Aalto’s importance. It gives a more accurate picture of how architecture is made.
A building as complete as Paimio is rarely the product of one hand.
A 40-year road towards Unesco
The series spans several decades and includes private homes, public buildings, churches, cultural institutions, workplaces and residential environments. Together, the sites present the Aalto studio’s human-centred response to the international modern movement.
The path to the current nomination has taken almost 40 years.
Aalto architecture was discussed as potential world heritage as early as the 1980s. Paimio Sanatorium was later prepared as an individual nomination, but Finland withdrew it before the World Heritage Committee considered it in 2007. The broader idea gradually emerged that Aalto’s international significance could be represented more convincingly through a series of buildings rather than a single site.
That series has now received a positive recommendation from ICOMOS, the advisory body that evaluates cultural heritage nominations for the World Heritage Committee.
The official draft decision recommends that Aalto Works be inscribed on the World Heritage List under criterion ii, which concerns the exchange and influence of human values in architecture and design. The World Heritage Committee is due to consider the nomination during its session in Busan on 26 July 2026.
Paimio would not become a separate World Heritage Site. It would be one component of the thirteen-part Aalto Works serial property.
That may sound like an administrative detail, but it is an important one. Paimio’s value lies partly in what makes it exceptional and partly in how it introduces ideas that continued to develop throughout the Aaltos’ work: responsiveness to place, integration of interiors and architecture, experimentation with materials and an unusual sensitivity towards the people using a building.
From tuberculosis hospital to a new idea of wellbeing
Paimio’s history did not stop in 1933.
As tuberculosis treatment changed, the sanatorium became a general hospital. The new use required extensive alterations, particularly during the 1970s, when patient rooms and technical systems were adapted to the needs of modern hospital care. Some original interiors and details were removed, while others survived or have since been restored.
After its hospital era, the future of the vast protected complex became a difficult question.
A historic building cannot survive on admiration alone. It needs maintenance, money and a use compatible with its architecture.
The Paimio Sanatorium Foundation, established in 2020, has been developing a new future for the site. A masterplan prepared with the Norwegian architecture practice Snøhetta proposes a combination of accommodation, wellbeing services, culture, events and international dialogue.
Plans include converting the former patient wing into guest rooms, reopening the sun balconies and creating a spa with direct access to the outdoors and surrounding forest. The former surgery wing is envisioned as a flexible space for conferences and events.
There is an obvious symmetry in this.
A place originally designed around health may once again become a place where people come to rest, breathe, think and spend time in nature.
But the new chapter will require care.
UNESCO’s evaluation specifically notes that Paimio remains vulnerable because a suitable long-term use must be secured and substantial conservation work is needed. It recommends continued funding and a compatible use that protects the building and its features.
The challenge is therefore not simply to turn an old hospital into a hotel or spa. It is to introduce contemporary life without reducing an unusually thoughtful building to a visual backdrop.
Wellbeing is also an environment
Today, wellbeing is frequently presented as something we purchase in a bottle, measure with a device or add to a morning routine.
Paimio Sanatorium proposes a broader view.
Wellbeing can also be affected by whether a light shines into tired eyes. Whether a room is quiet. Whether a chair supports the body comfortably. Whether nature is visible through a window. Whether shared spaces acknowledge the needs of the people using them.
None of these things is a miracle cure.
That is precisely why they remain convincing.
Paimio’s most enduring lesson is not that good architecture can replace medicine. It is that care should not end with medicine. The rooms, objects and environments surrounding a person can either add to the burden of illness or make daily life slightly more dignified.
More than ninety years after the sanatorium opened, the medical world has changed almost beyond recognition. The building’s central question has not.
How might the world around us be designed with greater consideration for the person experiencing it? That question belongs not only to hospitals or architects.
It belongs in homes, workplaces, public spaces and in the small routines from which everyday wellbeing is made.
From Paimio Sanatorium to Arctic Pure
For us at Arctic Pure, Paimio Sanatorium is much more than an architectural landmark. It has been our workplace for several years, and every day we are reminded that wellbeing is shaped not only by what we eat or the supplements we choose, but also by the environments in which we live and work.
We feel incredibly fortunate to be part of this unique place and its ongoing story. Whether you're interested in Finnish design, architecture, history or simply looking for an inspiring day trip, we warmly recommend visiting Paimio Sanatorium. Guided tours offer a fascinating insight into one of Finland's greatest architectural treasures and the human-centred thinking that still feels remarkably relevant today.
Learn more about the sanatorium and plan your visit at www.paimiosanatorium.com. We hope to welcome you to Paimio one day.