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Data mining through large, multi-band ground-based surveys and the recentavailability of source catalogues from the {\it Gaia} space mission has led toa surge in the number of known gravitationally lensed quasars, including someunusual systems. One of these newly discovered systems isGraL~J181730853+272940139. This system was reported in Delchambre et al. 2018,and was identified as a quadruply lensed quasar candidate via a machinelearning search inside {\it Gaia} Data Release 2, where it consists of threesources with maximum separation $1.8''$. Lemon et al. in prep (privatecommunications) confirmed it spectroscopically as a lensed quasar with sourceredshift $z=3.07$. A mass model of this system has not been published to date,and the highest resolution imaging data available is from PanSTARRS1\citep{chambers16}, with seeing $\sim1.0''-1.3''$ in the $grizy$ filters. Herewe present the first mass model of J1817+2729, which includes the measuredrelative astrometry and morphology of the lensing galaxy, using newly acquiredSubaru/FOCAS imaging.

An edge-on disk in the quadruply lensed quasar cross GraL~J181730853+272940139