Standard models of episodic memory emphasise that parallel streams of spatial information, arriving from medial entorhinal cortex (MEC), and object information, arriving from lateral entorhinal cortex (LEC), are integrated within the hippocampus. However, we recently discovered that fan cells in the LEC send direct projections to MEC, suggesting that spatial and object information could be integrated within MEC (Vandrey et al. 2022, doi:10.7554/eLife.83008). Evidence for object-related firing in the MEC is consistent with this possibility, but whether LEC projections influence spatial and object-related firing in the MEC is unclear. First, we asked if the population level activity of fan cells is sensitive to objects. Using fiber photometry to image GCaMP6s in fan cell axons, we established that fan cells are activated during exploration of objects in an arena. Next, to test whether LEC projections influence MEC firing during behaviour, we recorded with tetrodes from MEC neurons in an arena during optogenetic activation of fan cell axons. We found that LEC projections target spatial neurons in MEC, including grid cells and neurons that fire near objects, and that activation of fan cell axons typically inhibits firing of these populations. Finally, we optogenetically suppressed fan cell axons in MEC to evaluate how removal of LEC inputs influences object-firing in MEC. Analyses of these experiments are in progress. So far, our results are consistent with the idea that LEC provides object-related signals to MEC and suggest a circuit architecture for integration of ‘what’ and ‘where’ information upstream from the hippocampus.