Historic collection objects at Crafts Museum Ovelgönne
Collection & Research

Thousands of Objects.
One Memory.

We collect, preserve and research the crafts and everyday history of the Wesermarsch — accessible to all.

11,500+Collection Objects
650+Years of History
400 m²Exhibition Area
1773Townhouse Built

Our Mission

We see ourselves not merely as a store of the past, but as an active and inclusive memory of the community of Ovelgönne and the entire Wesermarsch.

As a scientifically guided museum, we collect tools, artefacts, original workshops and documents of the regional crafts and everyday culture from the 16th to the 20th century. One thing is particularly important to us: we do not preserve these testimonies behind locked doors.

What we collect depends on the current state of research and the social questions of our time — our holdings are living, not frozen.

Our goal is a lively dialogue about regional identity — yesterday, today and tomorrow. We make history comprehensible, experiential and accessible to all people.

In doing so we follow the principles of the ICOM Code of Ethics: collecting, preserving, researching, exhibiting and education form the core of our daily work.

Collecting & Preserving

Objects as witnesses of time.

Crafts Museum Ovelgönne places great value on material-cultural and cultural-historical aspects. What we collect depends on the current state of research and the social questions of our time.

Since our founding we have maintained a complete register of all objects. Every piece receives an inventory number and is catalogued by material, category and age. This digital documentation is the basis of our scientific work.

The Depot and the Coach House

Since 2018 we have been modernising our museum storage facilities. Improved air quality, effective light protection and stable temperatures ensure the long-term preservation of our sensitive collection — for all future generations.

Staff cataloguing historic objects

Museum Work according to ICOM

Collect. Preserve. Educate.

Three tasks that guide us daily — and that make our collection more than just a store of old things.

1

Collecting

We collect systematically: tools, artefacts, original workshops and everyday documents from the Wesermarsch — from the 16th to the early 20th century. Every addition to the collection follows scientific criteria and a clear research interest.

2

Preserving

Climate-controlled storage, preventive restoration, complete digital inventory: every object receives an inventory number and is documented by material, category and age. The collection is thus permanently preserved — for future generations too.

3

Education

History you can touch: we make our collection experiential for all people through exhibitions, education programmes, scientific partnerships and digital access — not behind glass, but in the midst of life.

Schusterkugeln in the exhibition — glass spheres and oil lamp in a wooden stand
Interactive Highlight

The Schusterkugel —
Light as a Tool.

A glass sphere filled with water that focuses light like a lens. For centuries indispensable for fine craft work. Here you can experience the physical principle yourself — with real photos, an interactive simulator and a quiz.

Discover now

Object in Focus · Inv. No. HMO-O/1620

The Schusterkugel.
Physics Meets Craft.

A glass sphere filled with water acts as a natural converging lens — and simultaneously filters the heat from the lamp. Discover the principle, experience the simulator and test your knowledge.

Interactive · Photos · Quiz
Inventory No.HMO-O/1620
Dating19th c. / Stand: 20th c.
MaterialGlass, Leather, Wood, Metal
TypeLight Source / Optics
OriginWesermarsch

The History

Focusing light, filtering heat: a simple tool that became indispensable.

Cobblers, watchmakers and scientists used water-filled glass spheres to concentrate the faint light of oil or gas lamps into a bright, focused beam. The water acts as a converging lens and simultaneously filters out the heat radiation, so that sensitive materials such as leather were not damaged.

The development of large converging lenses by Ehrenfried Walther von Tschirnhaus and later electric light eventually displaced the Schusterkugel. Today it is a fascinating testament to craft engineering ingenuity.

Scientific Background

Water has a refractive index of 1.33 (air: 1.0). The round shape causes converging refraction: all incoming rays meet at the focal point on the worktable.

At the same time, water absorbs infrared radiation (heat). Craftsmen could thus work close to strong light sources without scorching their materials.

Experience interactively

Light Refraction Simulator

Drag the glass sphere with your mouse or finger. Observe how it focuses the light.

Move the sphere and observe how the light gets focused.

The Principle in Four Steps

1
The Light Source

An oil or gas lamp emits diffuse light in all directions. For fine craft work it is far too weak and indistinct.

2
The Water Sphere

The water (refractive index 1.33) focuses all light rays like a large converging lens into a shared focal point.

3
The Focal Point

The focused light strikes the worktable brightly and precisely. The finest stitches were thus possible even in deep twilight.

4
The Heat Filter

Water absorbs infrared radiation. Valuable leather and other sensitive materials were not damaged by the lamp's heat.

Test Your Knowledge

0 / 3
Question 1 of 3

Why fill the glass sphere with water rather than air?

Correct! Water refracts light at index 1.33, significantly more than air (1.0), making it an effective converging lens.
The answer lies in physics: water (refractive index 1.33) bends light much more strongly than air (1.0) and focuses it precisely.
Question 2 of 3

What second important effect did the water filling have for craftsmen?

Exactly! Water absorbs infrared radiation. Leather and sensitive materials could be worked close to strong light sources.
The heat filter effect: water absorbs infrared radiation and protects temperature-sensitive materials from lamp heat.
Question 3 of 3

What ultimately replaced the Schusterkugel in the workshop?

Correct! First large converging lenses (incl. Tschirnhaus) replaced the Schusterkugel, then electric light made it completely obsolete.
Two developments: first giant converging lenses, then electric light. Without electricity the Schusterkugel would likely have remained in use longer.
🏆

Collection Specialist!

Object documentation according to ICOM Code of Ethics · Crafts Museum Ovelgönne · Inv. No. HMO-O/1620 · Collection: Leather Crafts

Research Areas

Our Collection Focus Areas.

We do not collect everything — but we collect systematically. Our holdings are divided into historic core areas that reflect life in the Wesermarsch from past to present.

Organisation & Training

From the traditional guild to the modern trade association. How the training system developed and how crafts were organised and passed on in former times.

History of Technology

The development of production techniques and the relationship between rural crafts and the emerging industrialisation in the Wesermarsch.

Women in the Crafts

The important role of women in historic trades — often beyond the official master certificates and chronicles, but indispensable to the complete picture.

Structural History

Change in village and rural spaces — illustrated by the barber-surgeon and the colonial goods store, showing how life in the countryside transformed.

Regional Biographies

Personal stories of craftswomen and craftsmen from the community — biographies showing how people shaped and managed their everyday lives.

Leisure & Culture

Photography, the historic choral room and bourgeois hobbies: how art and culture became increasingly important even in rural communities.

Science & Teaching

Cooperation with the University of Oldenburg.

We see ourselves as a teaching museum. In close collaboration with the Institute for Material Culture at Carl von Ossietzky University Oldenburg, we offer students hands-on insights into real museum work.

  • Scientific Practice Days Students on the Master's programme Museum and Exhibition work actively on concrete projects at our institution for a full semester.
  • The Teaching Museum Project Students conceive, curate and realise fully independent exhibitions directly within our historic premises.
  • The Museum Internship We integrate interns as professional equals into all scientific and organisational areas of the museum.
Educational programme
Students conducting research at the museum

Network & Partnerships

Partnerships that strengthen us.

We collaborate with science, associations and national networks — so that our collection receives the quality it deserves.

Cooperation Museum

Carl von Ossietzky University Oldenburg

As an official cooperation and teaching museum of the Institute for Material Culture, students from the Master's programme Museum and Exhibition work on site with us. They conceive and realise independent exhibitions — gaining real practical experience in a running museum operation.

Oldenburg, Lower Saxony
International Standards

ICOM & German Museums Association

All our museum work — collecting, preserving, documenting, exhibiting — follows the recommendations of the German Museums Association (DMB) and the ICOM Code of Ethics, the globally recognised ethical professional standard for museums. This ensures our work meets international quality standards.

ICOM Code of Ethics · DMB
Regional Network

Museum Association Wesermarsch & MVNB

We are a founding member of the Museum Association Wesermarsch and also a member of the Museum Association for Lower Saxony and Bremen (MVNB). Both networks strengthen the regional museum landscape and connect us with institutions throughout the region.

Wesermarsch · Lower Saxony

Participation & Exchange

Your Story Counts.

Do you have an object for us?

Many undiscovered treasures still lie in attics. If you have historic tools, artefacts, documents or photographs connected to Ovelgönne or the Wesermarsch, please do get in touch. We carefully examine every donation request for its historic significance.

Submit donation enquiry

Knowledge & Research

Researching regional crafts or everyday history? Or do you have questions about a specific object in our exhibition? We are happy to help — with detailed information from our archive.

Get in touch

Museum 24/7

Digital Time Travel.

Our doors are closed? No problem. Discover our digital offerings: accessible virtual tours, the historic online archive and high-resolution 3D scans of our most important exhibits.

Visit the Digital Archive