Diegem is a town in the municipality of Machelen, in the province of Flemish Brabant, Belgium.
A portion of Brussels Airport is located in Diegem,[1] together with neighbouring town of Zaventem.
Diegem's situation just outside the Brussels-Capital Region and close to the R0 (the Brussels orbital motorway) also means it has a large number of business premises.
Diegem's Gothic church, inaugurated in 1543, in the centre of town, has a conspicuous tiered spire.
[4] The Europe, Middle East, and Africa operations of Chevron Phillips are based in Stockholm Building in Airport Plaza in Diegem.