Complex sentence: Currently, parts of the complex are museums, in which visitors can roam through, and some parts of the compound are used by the Cultural Heritage Organization of Iran which is responsible for most of the artifacts, locations, and cultural aspects of the country.
Split into simpler sentences: Currently, parts of the complex are museums, in which visitors can roam through. The complex is operated by the Cultural Heritage Organization of Iran which is responsible for most of the artifacts, locations, and cultural aspects of the country.