HG Sullivan St., Greenwich Village, NYC 1961 - 1st painting sold here.
HG, Bleecker St., Greenwich Village, NYC 1962-1967 - paintings sold here provided money for the move to Spain.
HG, 950 Madison Ave., NYC 1967-1972 - across from the Whitney Museum.
HG Torremolinos, Costa del Sol, Spain 1962-1963
HG Atalaya Park, Costa del Sol, Spain 1964-1985
HG Hotel Puente Romano, Marbella, Spain 1965-1985
HG Mount St., London 1966-1976
HG Marbella Club Hotel, Spain 1967-1990
HG Hollander-York, Toronto 1968-1980
HG West Broadway, NYC 1970-1982
HG Hamburg, Germany 1975-1978
HG Museo Hollander, Cortijo De Las Yeguas, Spain 1982-1990 – archeological museum as well as a charitable organization.