Welcome to the FCCIS MDI and IR mockup workshop in Frascati!The MDI and IR mockup workshop of FCC Innovation Study of WP2 and Task 3 will be held in Frascati, National Laboratories of INFN, from 16 to 17 November 2023. This workshop will focus on Machine-Detector-Interface studies and on the IR mockup, covering topics such as:IR mockup critical concepts,Beam losses in the IR,Synchrotron radiation,IR HOM calculations,Vertex detector integration & cooling,Accelerator and detector constraints in the IR. We are looking forward to seeing you in Frascati !FCCIS – The Future Circular Collider Innovation Study. This INFRADEV Research and Innovation Action project receives funding from the European Union’s H2020 Framework Programme under grant agreement no. 951754.