pamyatnik

/pamjatnik/

Cases

SingularPluralWhen to use it
nominativepamyatnikthe monumentpamyatniklethe monumentsthe plain dictionary form — the doer of the sentence
genitivepamyatniknithe monument'spamyatniklenithe monuments'the owner — whose it is
accusativepamyatniknithe monument (as the object)pamyatniklenithe monuments (as the object)a specific, known object — whom or what
dativepamyatnikgeto the monumentpamyatniklegeto the monumentsdirection or recipient — to where, to whom
locativepamyatnikdeat / in the monumentpamyatnikledeat / in the monumentswhere it is; also having — mende bar, "I have it"
ablativepamyatnikdenfrom the monumentpamyatnikledenfrom the monumentswhere it comes from; also "than" when comparing
When to use each case
nominative
the plain dictionary form — the doer of the sentence
genitive
the owner — whose it is
accusative
a specific, known object — whom or what
dative
direction or recipient — to where, to whom
locative
where it is; also having — mende bar, "I have it"
ablative
where it comes from; also "than" when comparing

The endings are the same ones the pronouns wear — that page explains when each case is used.

With an owner

One ownedSeveral owned
mypamyatnigimmy monumentpamyatniklerimmy monuments
yourpamyatnigingyour monumentpamyatnikleringyour monuments
his / herpamyatnigihis / her monumentpamyatniklerihis / her monuments
ourpamyatnigibizour monumentpamyatnikleribizour monuments
you all'spamyatnigigizyou all's monumentpamyatniklerigizyou all's monuments
theirpamyatnikleritheir monumentpamyatnikleritheir monuments

The overlap in the last rows is real, not a mistake: pamyatnikleri can mean "his / her monuments", "their monument", or "their monuments" — context decides.