On the building.

A metal plaque.

The plaque remembers the effort of the 504th Parachite infantry Regiment, lead by Lt Col Julian Cook,  to cross the river near this location during Operation Market Garden.

The plaque is wrtten in Dutch and English.  The English reads: 

Operation Market Garden began on September 17, 1944. A major military operation to conquer the bridges over the rivers Maas, Waal and Rhine from the German occupier, started in the south of the Netherlands. This was done by dropping paratroopers and equipment around Eindhoven.
Nijmegen and Arnhem. The Allied troops would then move up to Arnhem. General Gavin of the 82nd Airborne Division was in charge of the liberation of the city's Grave and Nijmegen. The Groesbeek bridge was conquered on the first day. In the meanwhile, the Germans had sent extra troops to Nijmegen from the north, resulting in heavy battles. It became clear that it would take a long time to get hold of the Waal Bridge. The German soldiers had entrenched themselves on the south bank of the bridge around the Valkhof and Hunnerpark. They were
supported by heavy artillery from the village Lent at the other side of the Waal.

Time was running out; Germans in Arnhem besieged British troops. They needed help quickly. The idea arose to isolate the Germans on the south bank by taking the Waal Bridge from the north side. For this, the Waal had to be crossed by boat. US General Gavin commissioned MAJ
JULIAN AARON COOK to lead this dangerous operation. On September 20, 1944, Julian Aaron Cook joined in the first wave crossing the Waal River with 260 men of the 504th Parachute Infantry Regiment and 78 Engineers of C-Company, 307th Airborne Battalion, in 26 canvas boats furnished by the British Allies. Half the boats did not make it to the other side due to the hail of bullets and explosions. The boats left, were used for at least five new attacks. The soldiers who did reach the other side of the Waal, continued to the Waalbrug through the railway bridge and Fort Hof van Holland. In seizing the rail and road bridges, almost 50% of the soldiers were killed, wounded or missing in action.
Operation Market Garden eventually stranded in Arnhem.

The book "A Bridge Too Far" about this operation was written in 1974. A movie was made in 1977 with Robert Redford playing the role of Julian Aaron Cook. In 2013, a new bridge called 'DeOversteek" was opened at the location of the "crossing". To never forget what happened here in the past and to honor the commitment of, among others Julian Aaron Cook [1916-1990), in the liberation of Nijmegen this residential building has been named "AARON".

His full name crowns the building.
This plaque was unveiled on September 19, 2022 by Julian Aaron Cook's son: James E. Cook.