Illustrations of the observed prominence as seen in SDO/AIA, STEREO/EUVI, and the BBSO. Top panels correspond to Fe ix 171 Å, Fe xiv 211 Å, and He ii 304 Å AIA band-pass filter images. Bottom panels are BBSO Hα broad-band image, and Fe xii 195 Å and He ii 304 Å STEREO-B/EUVI band-pass images. All images were taken on 20 May 2011, the same day the TIP-II observations were carried out. The white box represents the TIP-II field-of-view. Lines of constant Stonyhurst heliographic longitude and latitude on the solar disk are overplotted. Axis are in heliocentric coordinates. The arrows pinpoint the location of horn-like structures in He ii 304 Å. The TIP-II slit virtual position can be seen in the bottom central panel. The quiescent prominence can be clearly seen in the AIA images, as well as in H_α. In STEREO-B, it can be seen as a dark, elongated structure. The temporal evolution of the prominence in the SDO/AIA Fe xiv 211 Å channel is available in the online edition.