diff --git a/include/HEJ/Weights.hh b/include/HEJ/Parameters.hh
similarity index 100%
copy from include/HEJ/Weights.hh
copy to include/HEJ/Parameters.hh
diff --git a/include/HEJ/Weights.hh b/include/HEJ/Weights.hh
index 8de138e..ca82f1f 100644
--- a/include/HEJ/Weights.hh
+++ b/include/HEJ/Weights.hh
@@ -1,97 +1,11 @@
 /** \file
- *  \brief Container for event Weights
+ *  \brief Legacy Header for Weights
+ *  \note  This Header was moved to "HEJ/Parameters.hh"
  *
  *  \authors   Jeppe Andersen, Tuomas Hapola, Marian Heil, Andreas Maier, Jennifer Smillie
  *  \date      2019
  *  \copyright GPLv2 or later
  */
 #pragma once
 
-#include "HEJ/exceptions.hh"
-
-#include <vector>
-
-namespace HEJ{
-  //! Collection of parameters, e.g. Weights, assigned to a single event
-  /**
-   * A number of member functions of the MatrixElement class return Parameters
-   * objects containing the squares of the matrix elements for the various
-   * scale choices.
-   */
-  template<class T>
-  struct Parameters {
-    T central;
-    std::vector<T> variations;
-
-    template<class T_ext>
-    Parameters<T>& operator*=(Parameters<T_ext> const & other);
-    Parameters<T>& operator*=(double factor);
-    template<class T_ext>
-    Parameters<T>& operator/=(Parameters<T_ext> const & other);
-    Parameters<T>& operator/=(double factor);
-  };
-
-  template<class T1, class T2> inline
-  Parameters<T1> operator*(Parameters<T1> a, Parameters<T2> const & b) {
-    return a*=b;
-  }
-  template<class T> inline
-  Parameters<T> operator*(Parameters<T> a, double b) {
-    return a*=b;
-  }
-  template<class T> inline
-  Parameters<T> operator*(double b, Parameters<T> a) {
-    return a*=b;
-  }
-  template<class T1, class T2> inline
-  Parameters<T1> operator/(Parameters<T1> a, Parameters<T2> const & b) {
-    return a/=b;
-  }
-  template<class T> inline
-  Parameters<T> operator/(Parameters<T> a, double b) {
-    return a/=b;
-  }
-
-  //! Shortcut for Weights, e.g. used by the MatrixElement
-  using Weights = Parameters<double>;
-
-  template<class T>
-  template<class T_ext>
-  Parameters<T>& Parameters<T>::operator*=(Parameters<T_ext> const & other) {
-    if(other.variations.size() != variations.size()) {
-      throw std::invalid_argument{"Wrong number of Parameters"};
-    }
-    central *= other.central;
-    for(std::size_t i = 0; i < variations.size(); ++i) {
-      variations[i] *= other.variations[i];
-    }
-    return *this;
-  };
-
-  template<class T>
-  Parameters<T>& Parameters<T>::operator*=(double factor) {
-    central *= factor;
-    for(auto & wt: variations) wt *= factor;
-    return *this;
-  };
-
-  template<class T>
-  template<class T_ext>
-  Parameters<T>& Parameters<T>::operator/=(Parameters<T_ext> const & other) {
-    if(other.variations.size() != variations.size()) {
-      throw std::invalid_argument{"Wrong number of Parameters"};
-    }
-    central /= other.central;
-    for(std::size_t i = 0; i < variations.size(); ++i) {
-      variations[i] /= other.variations[i];
-    }
-    return *this;
-  };
-
-  template<class T>
-  Parameters<T>& Parameters<T>::operator/=(double factor) {
-    central /= factor;
-    for(auto & wt: variations) wt /= factor;
-    return *this;
-  };
-}
+#include "HEJ/Parameters.hh"