Germany's World Heritage record: 55 inscribed properties, all but three of them cultural
Background
The UNESCO World Heritage Centre's State Party page for Germany records 55 Properties inscribed on the World Heritage List. Of these, 52 are cultural and 3 are natural; since 52 and 3 together account for all 55, Germany has no mixed property on the list. Germany's date of ratification of the World Heritage Convention is given as Monday, 23 August 1976. German properties on the list include Aachen Cathedral (1978), the Abbey and Altenmünster of Lorsch (1991), the Bauhaus and its Sites in Weimar, Dessau and Bernau (1996, 2017), Bergpark Wilhelmshöhe (2013) and the Archaeological Border complex of Hedeby and the Danevirke (2018). The same page lists 11 sites on Germany's Tentative List, which UNESCO describes as an inventory of those properties which each State Party intends to consider for nomination.
In plain words
State Party A country that has ratified the World Heritage Convention — Only a State Party may nominate sites within its territory for the World Heritage List.
Tentative List A State Party's inventory of properties it intends to consider for nomination — It is a waiting list of candidates and confers no World Heritage status.