My question is regarding tracking history.

Is there a way to ask NHibernate for a list of changes that
have been made to an object?

Would like to use this 'feature' to track history of the object(s).

Since NHibernate supports dynamic-update I assumed this logic
is built-in, but am not sure if it is accessible.

Thanks in advance.

the interceptor has a 'finddirty' method that should return the property indeces that have changed. Internally nh keeps track of these (as long as you are connected to a session) but I don't think there is an easy way to get that information out of the system. Look into that interceptor to find out.