The Green House is a renovated two-level structure. The house remains exactly as it was built more than half a century ago, and its façade is covered with green ivy. There are two modest galleries on each floor, and their intimate scale allows for the exhibition of small-format works. The Black House is a one-level, bungalow-style structure with no windows on the sides of the building facing the street, lit by skylights and a glass curtain wall in the back. Travelling exhibitions are central to the Walther Collection's global scope and desire to facilitate dialogue within and outreach beyond the field, expanding perspectives and engagement. The Walther Collection has participated in major art fairs such as Rencontres Africaines de la Photographie, Biennale Africaine de la Photographie (2017–2018); the Photography Show presented by AIPAD (2017); and Rencontres d'Arles (2014). The Walther Collection has organized a symposium for each major exhibition series, cultivating a space for research and scholarly discussion between leading international academics, curators, artists, and cultural producers in the field. The result of these symposia form the basis of critical and scholarly writing featured in the collection's publications. NYU Tisch & University College LondonScholars were invited to discuss the colonial, ethnographic, anthropologial and artistic categories that are often used to describe historic photographs of Africans. Participants include professors Awam Amkpa of NYU, Jennifer Bajorek of Hampshire College, Elizabeth Edwards of De Montfort University, Chika Okeke-Agulu of Princeton University, Erin Haney of the University of Johannesburg, Salah Hassan of Cornell University, Hlonipha Mokoena of Columbia University, Gabi Ncobo of the University of the Witswatersrand, John Peffer of Ramapo College, and professor emeritus Michael Godby of the University of Cape Town. The symposium also drew on the experience of curator Riason Naidoo of the South African National Gallery, and curator emeritus Christraud Geary of the Museum of Fine Arts in Boston. Tamar Garb, Durning Lawrence Professor in the History of Art at University College London, and Deborah Willis, Chair, NYU Tisch Department of Photography & Imaging, co-chaired the event. Columbia University Participants included professors Sandrine Colard of Columbia University, John Puffer of Ramapo College, Z. S. Strother of Columbia University, Allison Moore of the University of South Florida, and PhD candidate Antawan Byrd at Northwestern University.