It is Point (61) of the Route of the Neku Jatra Matya N.S. 2070.
Foto in Carl Pruscha, Kathmandu Valley, Vol. 2, 1st ed., Wien 1975
Foto by N.N. in http://visitlalitpur.blogspot.de/2011/01/9-ashok-stupas.html
Foto by F. Nunnemann (2014)
Huntington, John C. a.o., The Huntington Photographic Archive of Buddhist and Related Arts at The Ohio State University, Art of Newar Buddhism, Nepal
http://huntingtonarchive.osu.edu/Nepal/nepal.html