French architect Christian de Portzamparc

The Pritzker Prize-winner is a favourite of skyscraper developers, but his home in Paris is a humble, low-key place

Howard Lerman in his sixth-floor apartment in Manhattan
©Sara Hylton

Howard Lerman, co-founder of Yext

The man behind the online data service discusses tech start-ups and why he identifies his staff by personality type

Portraits of Nazneen Rahman at her home in South West London. 24rd April 2015. Photo credit : Chris Winter
©Chris Winter

Scientist and singer Nazneen Rahman

UK cancer specialist talks about medical breakthroughs and her musical career

Nikos Stampolidis
©Petros Efstathiadis

Greek archaeologist Nikos Stampolidis

The professor splits his time between excavations in Crete and running Athens’ Museum of Cycladic Art

Sally Cheshire in the garden of her home in Manchester
©Rebecca Lupton

UK fertility watchdog chair Sally Cheshire

The former consultant is helping Britain become the first country to adopt a controversial IVF technique

French count Jacques von Polier in Moscow

The businessman is a vocal supporter of Putin but is perhaps best known for his wild house parties

Jackie Akhavan at her home in Wiltshire
©Sam Frost

UK explosives expert Jackie Akhavan

World-class specialist discusses her counter-terrorism work and the struggle to recruit more women chemists

Evgeny Lebedev at Stud House, his home within the parklands of Hampton Court, London, with a wedding dress by Anselm Kiefer in the background
©Chris Winter

Evgeny Lebedev, newspaper proprietor

The Russian-born tycoon shows off the quintessential English country home he has restored — with a theatrical twist

Yolanda Kakabadse
©Misha Vallejo

Yolanda Kakabadse, president of the WWF

Former psychologist explains how environmental concerns prompted her to change career

Kailash Satyarthi at his home in Delhi
©Simon de Trey-White

Kailash Satyarthi, children’s rights activist

The joint winner of the 2014 Nobel Peace Prize on the difficulties and rewards of his campaign work in India

Software pioneer Dame Stephanie Shirley

The former child refugee who went on to create a £2.6bn IT business and now donates much of her fortune to combating autism

General the Lord Dannatt: soldier sent to the tower

Former army chief on his role as Constable of the Tower of London and sharing his living space with ghosts

Karen Donfried: a US view on Europe

The first female president of the German Marshall Fund on fostering transatlantic ties, war in Ukraine and her old job as a White House adviser

Matthew Barzun, US ambassador to the UK

The diplomat who has brought skateboard ramps and turntables to the ‘special relationship’

Christian Rudder of online dating site OkCupid

The entrepreneur on the algorithm helping 30m members find love — and why horror films are the key to compatibility

Colin Tweedy, managing director of The Building Centre

The former Arts & Business chief on why he thinks London is a ‘very ugly city’ and his mission to help ‘build a better world’

Ebola’s worst enemy: Dr Anthony S Fauci

The US scientist has become one of the most influential figures in disease control thanks to his work on Aids and other viruses

YouGov chief Stephan Shakespeare

Co-founder of the market research firm on the future of internet polling and how his company helped decide the Scottish independence campaign

Robert Lanza, stem-cell and cloning pioneer

The leading scientist on the ethics of bringing back Neanderthal man — and why he lives on a private island in a home full of dinosaur fossils

Inside the home of the UK ambassador to Ethiopia

British diplomat Greg Dorey on why the east African country is a fast emerging market that globally minded companies ‘must take seriously’