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Arnold Jan d'Ailly

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Adapted from the English Wikipedia article Arnold Jan d'Ailly, available under CC BY-SA 4.0Updated 11 August 2025
Arnold Jan d'Ailly
Born
Franeker, Netherlands
Occupation(s)Lawyer, banker, politician
Years active1926–1960
Known forMayor of Amsterdam (1946–1956)

Arnold Jan d'Ailly held the position of mayor of Amsterdam from 1946 until 1956.

Pre-political career

D'Ailly was born in Franeker and grew up in Doesburg, located in Gelderland. His father practiced as a general physician. After passing the Alfa track of the Gymnasium, he obtained a doctorate in law from the University of Amsterdam in 1926. His early professional life involved working as both a lawyer and a court clerk at the Amsterdam courthouse. In October 1929, following the financial turmoil caused by the Wall Street crash of 1929, d'Ailly transitioned into the financial sector to assist his father-in-law’s failing enterprise. Beginning as a third secretary at the Amsterdam stock exchange, he climbed steadily within finance. He wed Anna Fritz in 1930, and together they had five children, though one sadly died during childbirth.

By 1940, d'Ailly had assumed the role of director at KAS-Vereeniging bank. Throughout the German occupation of the Netherlands (1940–1945), he maintained a cautious stance and resisted joining the Nationaal Steunfonds; notably, KAS-Vereeniging was among only two Dutch banks that refrained from participating until 1944. Subsequently, he contributed to financing the 1944 railway strike designed to disrupt German supply lines during operation Market garden.

Labour party membership

Arnold Jan d'Ailly did not display political ambitions until he became a member of the newly established Labour Party in 1946. After World War II, although considered for the role of minister of finance in the Schermerhorn–Drees cabinet, he was ultimately not appointed. Instead, he continued his involvement in finance by serving on the board of the Central Bank of the Netherlands and leading the Herstelbank, responsible for managing funds allocated for post-war reconstruction. During this period, d'Ailly was recognized as a prominent figure within Amsterdam’s upper social circles.

Mayor of Amsterdam

In the aftermath of WWII, d'Ailly succeeded resistance leader Feike de Boer as Amsterdam's mayor. He played an instrumental role in guiding the city’s recovery by supervising major infrastructure developments such as completing the Amsterdam–Rhine Canal, constructing the Utrechtseweg highway, expanding the Amsterdam docks, and modernizing Schiphol international airport. Additionally, he facilitated the creation of new residential districts including Bos en Lommer, Geuzenveld, Slotervaart, and Slotermeer. From 1952 to 1956, he served as chairman of the Council of Municipalities (Vereniging der Nederlandse Gemeenten, VNG).

In response to the Czechoslovak coup in 1949, d'Ailly removed Communist aldermen Ben Polak and Leen Seegers from Amsterdam’s city council—a decision that generated controversy and internal municipal disputes.

He parted ways with the Labour Party in 1951 due to disagreements between Prime Minister Willem Drees and party leader Marinus van der Goes van Naters.

D'Ailly was known for his accessible demeanor and enjoyed widespread popularity among both colleagues and citizens. He often mingled with residents at public gatherings and maintained strong ties with the Dutch royal family, contributing to efforts supporting Princess Beatrix's succession to queen.

As an energetic advocate for Amsterdam’s commercial interests, d'Ailly undertook extensive international travel—visiting nearly 40 cities abroad—which earned him the moniker "the flying mayor." A caricature by Jo Spier playfully referred to him as "Mayor d' Ailleurs" ("mayor from elsewhere").

Retirement and later life

In 1956, d'Ailly stepped down from his position as mayor of Amsterdam, officially attributing his departure to the necessity for fresh political leadership. Nevertheless, his relationship with the artist Gisèle van der Gracht resulted in a decline in support from Queen Juliana, who held authority over mayoral appointments. Consequently, he refrained from pursuing additional political offices.

Following this, d'Ailly re-entered the financial sector, assuming the role of director at Nationale Handelsbank NV in 1957 before retiring completely in 1960.