The White Rose base was an incredibly large structure, with the center of the building looking more like a giant castle with its tall, leaning spires. Around the building itself, there were also several departments that worked together.
Different buildings housed different teams organizing a number of different things. For one, the White Rose accepted many donations to continue doing their work. They also connected with other organizations based in other countries.
At times, situations could become dire in other countries, and support teams would need to be sent to help out. Not only that, but the White Rose base city was a place where government officials would gather.
Those that needed protection from others that ran their cities. An image was kept up; the government was there for the people. Their decisions and laws were there to protect the people.