The ancient rhetoric genus deliberativum (Beratungsrede) does not directly correspond to modern forms of political speech, neither in a synchronic nor in a diachronic view. Nevertheless, the genus deliberativum provides the background for the observation of political communication from a rhetoric-linguistic perspective. One prototype of political speech in that sense are speeches at political conventions (Parteitagsreden). The chapter characterizes this type of political communication and gives examples for analyses. Included in the discussion are also speeches on conventions of the SED (Socialist Unity Party of Germany), which follow the specific characteristics of political and public communication in the GDR.