Examples of such conversations include discussions in conference rooms, classroom lectures, or religious services. Walker's Eidouranion was the heart of his public lectures or theatrical presentations. Varoufakis has since appeared in numerous debates, lectures and interviews. He has also given 137 named lectures and commencement speeches. Celebrations include several days of concerts, lectures, other cultural activities. The greeting is regularly exchanged during Muslim lectures and sermons. The museum currently hosts tours, classes, lectures, and special events. He was the first to hold regular anatomy lectures and demonstrations. Woodward also frequently lectures at colleges and universities. This is usually done in association with educational signs and lectures. She soon became swamped with requests for interviews and lectures. He conducted many illustrated lectures of his work. Campbell began sharing this idea with students during his lectures in the 1970s. The lectures of Razi attracted many students. Layton delivering many lectures and readings throughout Canada.