In　this　work,　two　rare　high-dimensional　polyoxoniobates　with　formulas　of　H-9[Cu(en)(H2O)(2)][Cu(en)(2)](8)[Dy(H2O)(4)](3)[Nb-24-O-69(H2O)(3)](2)　.　36H(2)O　(1)　and　H9K[Cu(en)(2)(H2O)](5)[Cu(en)(2)](4)-[Eu(H2O)(4)](3)[Nb24O69(H2O)(3)](2)　.　2en　.　45H(2)O　(2)　have　been　obtained　under　hydrothermal　conditions.　These　extended　materials　are　constructed　from　lanthanide-incorporated　triangular-prism-like　polyoxoniobate　secondary　building　units　(SBUs)　{[Ln(H2O)(4)](3)[Nb24O69(H2O)(3)](2)}　(Ln=Dy,　Eu).　1　and　2　represent　the　first　examples　of　high-dimensional　polyoxometalate　materials　based　on　such　lanthanide-incorporated　triangular-prism-like　polyoxoniobate　SBUs.　Furthermore,　the　proton　conduction　property　and　the　luminescent　emission　of　these　materials　were　evaluated.