Urgent announcements, Due to the circular of the Ministry of Health (Iran) based on closing all universities and higher educational centers of Tehran province until futher notice and according to the circular of the Ministry of Science, Research and Technology (Iran),in order to not holding any conferences, gatherings, feasts and celebrations in regards of convening people; Therefore, The secretariat of the conference is announcing, as a result of the condition of the country (outbreak of Corona Virus- CorVid-19), the "First International Conference and the Fifth National Conference on Architecture and Sustainable Cities" will not be held on 29th of February 23 and March the first, 2020. Certificate Acceptances (of Papers and Book Proceedings) will be sent to the email address of researchers abroad. Indexing of articles will be taken place in the coming weeks and researchers will be informed subsequently. With respect, Secretariat of the Conference.