An organisation's culture depends on three things.
The first is business leaders' behaviour as role models, which is dependent on their brand, identity, and their personal values, and which play out in the smallest of their actions.
The second is the narratives that are embraced, as well as the behaviours that are encouraged, as these form a big cornerstone of the culture.
The last but not the least are the symbols that prescribe organisational culture. These includes detail like whether the office employs an open layout, or how washrooms are delineated. These say a lot about an organisation's inherent culture.
It is the leader's responsibility to understand this interplay between their behaviour, those being embraced, and the symbols that propagate what an organisation stands for.