The German polymath Johann Wolfgang von Goethe considered his monumental book known in English as The Theory of Colours to be his greatest achievement. The book is a record of hundreds of Goethe’s observations about the way colour affects our mood, as well as a long and heated polemic with Isaac Newton’s colour theory. Goethe’s understanding of light and colour was scientifically flawed yet his book had a surprisingly strong influence on the fine and applied arts. To find out why, Bridget Kendall talks to art historian Alexandra Loske, colour writer Victoria Finlay and designer Odette Steele.

Photo: Goethe’s colour wheel, 1809. (Credit: Freies Deutsches Hochstift / Frankfurter Goethe-Museum)

From 1849, hundreds of thousands of prospectors from across the USA headed for California in the hope of finding gold. Some made great fortunes, and there was a new Californian dream for these 49ers, willing to risk everything and, if they failed, to try again. California was to become the engine house of the US economy, while expanding so rapidly that it unbalanced the free and slave-owning states and hastened the USA towards civil war. Yet the new arrivals also drove out competing miners from around the Pacific who had reached the goldfields first, and destroyed the lives of Native Americans there, and excluded Chinese people who had begun to settle, with lasting consequences.

Joining Bridget Kendall to explore who won and who lost in the California Gold Rush are Cliff Trafzer, Distinguished Professor of History at the University of California, Riverside; Mae Ngai, Professor of History at Columbia University, and author of the forthcoming book The Chinese Question, a study of Chinese gold miners; and HW Brands, Professor of History at The University of Texas at Austin and author of Dreams of El Dorado: A History of the American West.

(Image: Gold Nuggets Credit: bodnarchuk/Getty Images)

A century ago a deadly flu virus swept the planet, uniting the world in a disaster on a par with World War One. Over 50 million people died. Social distancing was put in place but drugs were ineffective, there was no vaccine, and in many places medicine could not cope. The world recovered but was never the same again.

What can the last great pandemic teach us about how to combat Covid-19 today?

Three world experts join Bridget Kendall: Laura Spinney, science journalist and author of Pale Rider: The Spanish Flu of 1918 and How it Changed the World;. Svenn Erik Mamelund, historical demographer and research professor at Oslo Metropolitan University; Siddharth Chandra, director of the Asian Studies Centre and professor at James Madison College, Michigan State University.

(Photo: Japanese school girls wear protective masks to guard against the influenza outbreak. Credit: Bettmann/Getty Images)

It’s the map of the world we all recognise today, but until Gerard Mercator came up with his elegant solution in 1569, the question of how to turn the earth’s three dimensional sphere into a flat image had long flummoxed mapmakers. Nearly 500 years later, Mercator’s model is still the standard for modern mapmaking. What makes it so enduring?

Joining Rajan Datar to discuss the man who defined the way we see the world are geographer and explorer Nicholas Crane, philosopher Emily Thomas and professor of cartography Philippe De Maeyer.

Illustration: Portrait of Gerard Mercator, Flemish cartographer (born Gerard de Kremer, 1512 - 1594). Image credit: Stock Montage/Getty Images

How many people can lay claim to playing a key role in three different 20th century protest movements across the world, each of which largely succeeded in their aims? Margaret ‘Gretta’ Cousins, the daughter of a minor court official from Boyle in Ireland and a musician by profession certainly can.

Rajan Datar is joined by historians Dr. Margaret Ward from Queen's University in Belfast, Dr. Jyoti Atwal from Jawaharlal Nehru University, New Delhi and University of Limerick and Dr. Emily Rook-Koepsel from the University of Pittsburgh.

(Photo: Margaret Cousins, c.1931)

Natsume Soseki is one of the greatest writers in the history of Japan. The backdrop to his work is the disorientation and social anxiety of the early 20th Century as Japan undertook rapid modernization after centuries of being closed to the world. Soseki has had a huge influence on generations of Japanese authors and has obsessed some international artists. His work is taught to generations of school children in Japan and greatly admired by scholars but remains obscure to much of the rest of the world. Why?

(Photo: Natsume Soseki on a 1000 Yen note, series D. Credit: A Dagli Orti/DEA/Getty Images)

The popular view of an Epicurean is that of somebody who focuses on pleasure as our guiding principle, indulging in the finer things of life to achieve happiness. And yet what the Ancient Greek philosopher Epicurus understood by pleasure was far more nuanced. In fact, Epicurus and his followers advocated a simple lifestyle, withdrawn from society, where we are content with little.

(Image: Bust of Epicurus. Photo: DEA / G. DAGLI ORTI/De Agostini via Getty Images)

One of the most celebrated female painters of the 17th century, Artemisia Gentileschi was the first woman to become a member of the Academy of the Arts of Drawing in Florence. Through her talent and determination - and despite massive obstacles - she forged a 40-year career, and was collected by the likes of Charles I of England and Philip IV of Spain. But after her death, it wasn’t until the 20th century that people began to reinterpret her work in the light of her remarkable life story, including the well-documented fact that she was raped at the age of 17 by fellow painter, Agostino Tassi.

Joining Bridget Kendall to discuss the life and work of Italian Baroque artist, Artemisia Gentileschi are four experts: Letizia Treves is curator of the 2020 Artemisia exhibition at London’s National Gallery; Mary Garrard is Professor Emerita of Art History at American University in Washington DC; Jesse Locker is Assistant Professor of Italian Renaissance & Baroque Art at Portland State University; and Patrizia Cavazzini is Research Fellow at the British School at Rome, Italy.

Produced by Jo Impey for BBC World Service

Image: Self-Portrait as Saint Catherine of Alexandria by Artemisia Gentileschi

We are now familiar with dogs helping people with sight loss but where did the idea come from? And how have the ways of selecting, training and using guide dogs changed over time?

Bridget Kendall explores the history of guide dogs with Pieter van Niekerk, Head of Public Relations for the South African Guide-Dogs Association and with Karin Floesser, one of the guide dog leaders of the German Federation for the Blind and Partially Sighted. Bridget is also joined by journalist and educator Miriam Ascarelli, biographer of Dorothy Harrison Eustis, the philanthropist who in the 1920s co-founded the American Seeing Eye school, and she hears from Michael Hingson, a blind survivor of the 9/11 attacks.

(Image: A guide dog in Shanghai, China. Credit: Wang He/Getty Images)

Best known for his curvaceous buildings and his design of Brasilia, Oscar Niemeyer was one of Brazil’s greatest architects and a leading pioneer of modernism. During his seven- decade career, Niemeyer designed hundreds of remarkable buildings not just in his native Brazil but also in Europe and as far afield as Algeria. His experimentation with reinforced concrete produced organic curved shapes that were a significant departure from the austere style of European modernism. An ardent communist, Niemeyer hoped his beautiful buildings would be for all sections of society to enjoy, but how does his vision and influence endure today, and are his striking creations still functional and sustainable?

Joining Rajan Datar to discuss Oscar Niemeyer and his work are Professor Richard Williams from the University of Edinburgh and the author of “Brazil: Modern Architectures in History”; the Brazilian architect and lecturer at the University of Bath, Dr Juliana Calabria Holley, and Maria Paz Gutierrez, Associate Professor of Architecture at the University of California, Berkeley.

(Image: a view of the Contemporary Art Museum (MAC) in Niteroi, Rio de Janeiro state, with the Sugar Loaf mountain in the background. Credit: REUTERS/Pilar Olivares)