The Astronomical Observatory of Belgrade had the honor on November, 8th 2010 to host Prof. Sir Arnold Wolfendale, FRS, 14th Astronomer Royal. Prof. Wolfendale visited the Observatory and was shown the Great refractor by Dr. Ištvan Vince, deputy director of AOB and head of WP2 of the BELISSIMA project, Dr. Srdjan Samurović, coordinator of the BELISSIMA project and Dr. Oliver Vince, member of the staff of the Observatory. Prof. Wolfendale spoke with the staff of the Observatory and the BELISSIMA project was described to him. In the conversation with Prof. Wolfendale the possibilities of collaboration with the astronomers from the United Kingdom were discussed as well as numerous problems of contemporary astronomy and science (cosmic rays, observations of the Sun, observations of binary stars, dynamics of galaxies, climate changes, astrobiology).