Our team took part in the organization and holding of the XII International Symposium on Photonic Echo and Coherent Spectroscopy (PEKS-2021) in memory of Professor Vitaly Vladimirovich Samartsev, held from October 25 to 30, 2021. During the Symposium, the XXV International Youth Scientific School “Coherent Optics and Optical Spectroscopy” (COOS-2021) was organized. Conference website: http://pecs.su/