He was invested with the Royal Victorian Order by Edward VII in 1909 and, in 1912, he was ennobled by Franz Joseph I of Austria; becoming a part of the Hungarian nobility.

László's portrait of Pope Leo XIII earned him a Grand Gold Medal at the Paris International Exhibition in 1900.

In 1907, he moved to England and remained based in London for the remainder of his life, although endlessly travelling the world to fulfil commissions.

[6] László became interested in Catholicism as a young man, probably through his friendship with the Valentins, an elderly Bavarian couple.

[7] He was baptised into the Catholic Church in 1894 ... "he never worshipped regularly but read the Bible and was a firm believer in God and the Christian story".

In October 1937, he had a heart attack and died a month later at his home, Hyme House, in Fitzjohns Avenue, Hampstead, London.

In 2010, Yale University Press published De László, His Life and Art by Duff Hart-Davis and Dr. Caroline Corbeau-Parsons.