Take a sought-after architect, add the king of "new Africa cuisine" and a smattering of famous designers, and you get a concept-store in Lagos that seeks to bring modern African luxury to Nigeria's ultra-rich.

The chaotic, cosmopolitan metropolis has largely failed to cater for its mega-rich minority despite a big appetite for high-end shopping and eating in a country that houses 11 of Africa’s 50 biggest fortunes, according to Forbes magazine. So, Reni Folawiyo, a businesswoman married to one of the 11 – multi-millionaire…